arch: arm: cortex_m: linker: fix mpu setup failure when XIP disabled

Add a padding section after the final read only data section
to avoid overlap between ROMABLE_REGION and RAMABLE_REGION.

Signed-off-by: Ha Duong Quang <[email protected]>

Author: haduongquang

include/zephyr/arch/arm/cortex_m/scripts/linker.ld

@@ -225,7 +225,7 @@ SECTIONS
 
 #include <zephyr/linker/cplusplus-rom.ld>
 
-#if defined(CONFIG_BUILD_ALIGN_LMA)
+#if defined(CONFIG_BUILD_ALIGN_LMA) || !defined(CONFIG_XIP)
     /*
      * Include a padding section here to make sure that the LMA address
      * of the sections in the RAMABLE_REGION are aligned with those