ITE Keyboard scan: add registers for ITE keyboard scan driver

Add registers for it8xxx2 keyboard scan driver.

Signed-off-by: Ruibin Chang <Ruibin.Chang@ite.com.tw>
diff --git a/soc/riscv/riscv-ite/common/chip_chipregs.h b/soc/riscv/riscv-ite/common/chip_chipregs.h
index fdb9211..62e97a2 100644
--- a/soc/riscv/riscv-ite/common/chip_chipregs.h
+++ b/soc/riscv/riscv-ite/common/chip_chipregs.h
@@ -859,10 +859,14 @@
 /* --- Wake-Up Control (WUC) --- */
 #define IT8XXX2_WUC_BASE   0x00F01B00
 
+/* TODO: should a defined interface for configuring wake-up interrupts */
 #define IT8XXX2_WUC_WUEMR1 (IT8XXX2_WUC_BASE + 0x00)
+#define IT8XXX2_WUC_WUEMR3 (IT8XXX2_WUC_BASE + 0x02)
 #define IT8XXX2_WUC_WUEMR5 (IT8XXX2_WUC_BASE + 0x0c)
 #define IT8XXX2_WUC_WUESR1 (IT8XXX2_WUC_BASE + 0x04)
+#define IT8XXX2_WUC_WUESR3 (IT8XXX2_WUC_BASE + 0x06)
 #define IT8XXX2_WUC_WUESR5 (IT8XXX2_WUC_BASE + 0x0d)
+#define IT8XXX2_WUC_WUENR3 (IT8XXX2_WUC_BASE + 0x0a)
 #define IT8XXX2_WUC_WUBEMR1 (IT8XXX2_WUC_BASE + 0x3c)
 #define IT8XXX2_WUC_WUBEMR5 (IT8XXX2_WUC_BASE + 0x0f)