Arm platforms: Rename PLAT_ARM_NS_IMAGE_OFFSET

PLAT_ARM_NS_IMAGE_OFFSET is in fact not an offset relative to some base
address, it is an absolute address. Rename it to avoid any confusion.

Change-Id: I1f7f5e8553cb267786afe7e5f3cd4d665b610d3f
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
diff --git a/plat/arm/common/arm_nor_psci_mem_protect.c b/plat/arm/common/arm_nor_psci_mem_protect.c
index dfbd129..3a70059 100644
--- a/plat/arm/common/arm_nor_psci_mem_protect.c
+++ b/plat/arm/common/arm_nor_psci_mem_protect.c
@@ -21,7 +21,7 @@
  * until the end of DRAM1.
  * We limit the size of DRAM2 to 1 GB to avoid big delays while booting
  */
-#define DRAM1_NS_IMAGE_LIMIT  (PLAT_ARM_NS_IMAGE_OFFSET + (32 << TWO_MB_SHIFT))
+#define DRAM1_NS_IMAGE_LIMIT  (PLAT_ARM_NS_IMAGE_BASE + (32 << TWO_MB_SHIFT))
 #define DRAM1_PROTECTED_SIZE  (ARM_NS_DRAM1_END+1u - DRAM1_NS_IMAGE_LIMIT)
 
 static mem_region_t arm_ram_ranges[] = {