boards: em_starterkit: fix the mpu regions definition

_image_rom_end to _image_rom_size

Signed-off-by: Wayne Ren <[email protected]>

Author: Wayne Ren

boards/arc/em_starterkit/arc_mpu_regions.c

@@ -14,7 +14,7 @@ static struct arc_mpu_region mpu_regions[] = {
 	/* Region ICCM */
 	MPU_REGION_ENTRY("IMAGE ROM",
 			 (u32_t) _image_rom_start,
-			 (u32_t) _image_rom_end,
+			 (u32_t) _image_rom_size,
 			 REGION_FLASH_ATTR),
 	MPU_REGION_ENTRY("APP MEMORY",
 			 (u32_t) __app_ram_start,
@@ -55,7 +55,7 @@ static struct arc_mpu_region mpu_regions[] = {
 			 64 * 1024,
 			 AUX_MPU_RDP_KW | AUX_MPU_RDP_KR),
 };
-#else
+#else /* CONFIG_USERSPACE */
 static struct arc_mpu_region mpu_regions[] = {
 #if CONFIG_ICCM_SIZE > 0
 	/* Region ICCM */