fix(fvp): adjust BL31 maximum size as per total SRAM size

Adjusted BL31 maximum size as per total SRAM size.

Change-Id: Ifdfdedb8af3e001cebba8e60c973f3c72be11652
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
(cherry picked from commit 24e224b41cc6fda4b507861cf8e409d8e4a3f7cd)
diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index ab0e4ff..493e3e8 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -503,7 +503,8 @@
  * Define limit of firmware configuration memory:
  * ARM_FW_CONFIG + ARM_BL2_MEM_DESC memory
  */
-#define ARM_FW_CONFIGS_LIMIT		(ARM_BL_RAM_BASE + (PAGE_SIZE * 2))
+#define ARM_FW_CONFIGS_SIZE		(PAGE_SIZE * 2)
+#define ARM_FW_CONFIGS_LIMIT		(ARM_BL_RAM_BASE + ARM_FW_CONFIGS_SIZE)
 
 #if ENABLE_RME
 /*