Arm platforms: Remove common RAS configuration source

The file arm_ras.c intended to provide common platform-specific RAS
configuration for Arm platforms. Because this file has symbol
definitions, it's proving difficult to provide a common definition.

This patch therefore renames and makes the file specific to FVP. Other
platforms shall provide their own configuration in similar fashion.

Change-Id: I766fd238946e3e49cdb659680e1b45f41b237901
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 76a75d3..5330847 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -236,8 +236,7 @@
 # RAS sources
 ifeq (${RAS_EXTENSION},1)
 BL31_SOURCES		+=	lib/extensions/ras/std_err_record.c		\
-				lib/extensions/ras/ras_common.c \
-				plat/arm/common/aarch64/arm_ras.c
+				lib/extensions/ras/ras_common.c
 endif
 
 ifneq (${TRUSTED_BOARD_BOOT},0)