ast10x0/i3c: fix RAM region overflow into RAM_NC after merge

The i3c_init and i3c_irq test configs still used the pre-merge
ram_size_bytes (384KB), which now overlaps the RAM_NC alias region
introduced at 0x000A0000 by the upstream merge, causing a link-time
section overlap error. Shrink ram_size_bytes in each config so
ram_start_address + ram_size_bytes lands exactly on the RAM_NC
boundary, matching the fix already applied upstream to i2c_irq.

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
diff --git a/MODULE.bazel.lock b/MODULE.bazel.lock
index 430e8cc..0d4c973 100644
--- a/MODULE.bazel.lock
+++ b/MODULE.bazel.lock
@@ -819,8 +819,8 @@
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@@ -873,8 +872,7 @@
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@@ -1225,10 +1193,10 @@
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diff --git a/target/ast10x0/peripherals/scu/pinctrl.rs b/target/ast10x0/peripherals/scu/pinctrl.rs
index b411e13..1fdbc52 100644
--- a/target/ast10x0/peripherals/scu/pinctrl.rs
+++ b/target/ast10x0/peripherals/scu/pinctrl.rs
@@ -740,19 +740,6 @@
 /// I2C communication between the two AST1060 daughter cards.
 pub const PINCTRL_I2C2: &[PinctrlPin] = &[PIN_SCU418_0, PIN_SCU418_1];
 
-/// SGPIOM (Serial GPIO Master) pin group: mux selection on SCU41C[8:11].
-///
-/// Enables the four SGPIOM serial pins:
-///   - bit 8  `sgpmclk` — serial clock out
-///   - bit 9  `sgpmld`  — load/latch out
-///   - bit 10 `sgpmo`   — serial data out
-///   - bit 11 `sgpmi`   — serial data in
-///
-/// Mux bits derived from the AST10x0 datasheet / Zephyr `ast10x0-pinctrl.dtsi`
-/// (`pin_sgpmclk/ld/o/i` = `SIG_DESC_SET(0x41C, 8..11)`).
-pub const PINCTRL_SGPIOM: &[PinctrlPin] =
-    &[PIN_SCU41C_8, PIN_SCU41C_9, PIN_SCU41C_10, PIN_SCU41C_11];
-
 // =============================================================================
 // I3C pin groups
 // =============================================================================
@@ -821,6 +808,19 @@
     PIN_SCU4B8_15,
 ];
 
+/// SGPIOM (Serial GPIO Master) pin group: mux selection on SCU41C[8:11].
+///
+/// Enables the four SGPIOM serial pins:
+///   - bit 8  `sgpmclk` — serial clock out
+///   - bit 9  `sgpmld`  — load/latch out
+///   - bit 10 `sgpmo`   — serial data out
+///   - bit 11 `sgpmi`   — serial data in
+///
+/// Mux bits derived from the AST10x0 datasheet / Zephyr `ast10x0-pinctrl.dtsi`
+/// (`pin_sgpmclk/ld/o/i` = `SIG_DESC_SET(0x41C, 8..11)`).
+pub const PINCTRL_SGPIOM: &[PinctrlPin] =
+    &[PIN_SCU41C_8, PIN_SCU41C_9, PIN_SCU41C_10, PIN_SCU41C_11];
+
 /// Macro to safely modify a register bit (set or clear).
 macro_rules! modify_reg {
     ($reg:expr, $bit:expr, $clear:expr) => {{
diff --git a/target/ast10x0/tests/peripherals/i3c/i3c_init/system.json5 b/target/ast10x0/tests/peripherals/i3c/i3c_init/system.json5
index 40e635a..4c65433 100644
--- a/target/ast10x0/tests/peripherals/i3c/i3c_init/system.json5
+++ b/target/ast10x0/tests/peripherals/i3c/i3c_init/system.json5
@@ -13,6 +13,6 @@
         flash_start_address: 0x00000500,  // After vector table
         flash_size_bytes: 262144,         // 256KB for kernel code (in RAM)
         ram_start_address: 0x00040500,    // RAM starts after code
-        ram_size_bytes: 393216,           // 384KB for data
+        ram_size_bytes: 391936,           // ends at RAM_NC boundary (0x000A0000)
     },
 }
diff --git a/target/ast10x0/tests/peripherals/i3c/i3c_irq/slave_system.json5 b/target/ast10x0/tests/peripherals/i3c/i3c_irq/slave_system.json5
index dd904d4..f44b90d 100644
--- a/target/ast10x0/tests/peripherals/i3c/i3c_irq/slave_system.json5
+++ b/target/ast10x0/tests/peripherals/i3c/i3c_irq/slave_system.json5
@@ -12,7 +12,7 @@
         flash_start_address: 0x00000600,
         flash_size_bytes: 262144,
         ram_start_address: 0x00040600,
-        ram_size_bytes: 393216,
+        ram_size_bytes: 391680,           // ends at RAM_NC boundary (0x000A0000)
         interrupt_table: {
             table: {
                 // I3C2 IRQ (bus 2, used by the HV IBI test).
diff --git a/target/ast10x0/tests/peripherals/i3c/i3c_irq/system.json5 b/target/ast10x0/tests/peripherals/i3c/i3c_irq/system.json5
index e9d3c1c..91a7c0c 100644
--- a/target/ast10x0/tests/peripherals/i3c/i3c_irq/system.json5
+++ b/target/ast10x0/tests/peripherals/i3c/i3c_irq/system.json5
@@ -13,7 +13,7 @@
         flash_start_address: 0x00000600,  // After vector table
         flash_size_bytes: 262144,         // 256KB for kernel code (in RAM)
         ram_start_address: 0x00040600,    // RAM starts after code
-        ram_size_bytes: 393216,           // 384KB for data
+        ram_size_bytes: 391680,           // ends at RAM_NC boundary (0x000A0000)
         interrupt_table: {
             table: {
                 // I3C2 IRQ (bus 2, used by the HV IBI test).