dts: bindings: rng: add sifli,sf32lb-trng

Add sifli,sf32lb-trng

Signed-off-by: Qingsong Gou <gouqs@hotmail.com>

dts/bindings/rng/sifli,sf32lb-trng.yaml

diff --git a/dts/bindings/rng/sifli,sf32lb-trng.yaml b/dts/bindings/rng/sifli,sf32lb-trng.yaml
new file mode 100644
index 0000000..22b43df
--- /dev/null
+++ b/dts/bindings/rng/sifli,sf32lb-trng.yaml
@@ -0,0 +1,18 @@
+# Copyright (c) 2025, Qingsong Gou <gouqs@hotmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+description: Sifli SF32LB TRNG (True Random Number Generator).
+
+compatible: "sifli,sf32lb-trng"
+
+include: base.yaml
+
+properties:
+  reg:
+    required: true
+
+  interrupts:
+    required: true
+
+  clocks:
+    required: true