fconf: Clean confused naming between TB_FW and FW_CONFIG

Cleaned up confused naming between TB_FW and FW_CONFIG.

Signed-off-by: Louis Mayencourt <louis.mayencourt@arm.com>
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I9e9f6e6ca076d38fee0388f97d370431ae067f08
diff --git a/plat/arm/common/arm_bl31_setup.c b/plat/arm/common/arm_bl31_setup.c
index 85535c1..ded8f89 100644
--- a/plat/arm/common/arm_bl31_setup.c
+++ b/plat/arm/common/arm_bl31_setup.c
@@ -28,10 +28,10 @@
 
 #if !RESET_TO_BL31
 /*
- * Check that BL31_BASE is above ARM_TB_FW_CONFIG_LIMIT. The reserved page
+ * Check that BL31_BASE is above ARM_FW_CONFIG_LIMIT. The reserved page
  * is required for SOC_FW_CONFIG/TOS_FW_CONFIG passed from BL2.
  */
-CASSERT(BL31_BASE >= ARM_TB_FW_CONFIG_LIMIT, assert_bl31_base_overflows);
+CASSERT(BL31_BASE >= ARM_FW_CONFIG_LIMIT, assert_bl31_base_overflows);
 #endif
 
 /* Weak definitions may be overridden in specific ARM standard platform */