fix(ras): restrict RAS support for NS world

Current RAS framework in TF-A only supports handling errors originating
from NS world but the HANDLE_EA_EL3_FIRST flag configures it for all
lower Els. To make the current design of RAS explicit, rename this macro
to HANDLE_EA_EL3_FIRST_NS and set EA bit in scr_el3 only when
switching to NS world.

Note: I am unaware of any platform which traps errors originating in
Secure world to EL3, if there is any such platform then it need to
be explicitly implemented in TF-A

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: If58eb201d8fa792c16325c85c26056e9b409b750
diff --git a/plat/renesas/common/common.mk b/plat/renesas/common/common.mk
index 26a5798..ca61f0e 100644
--- a/plat/renesas/common/common.mk
+++ b/plat/renesas/common/common.mk
@@ -15,7 +15,7 @@
 MULTI_CONSOLE_API		:= 1
 
 CRASH_REPORTING			:= 1
-HANDLE_EA_EL3_FIRST		:= 1
+HANDLE_EA_EL3_FIRST_NS		:= 1
 
 # This option gets enabled automatically if the TRUSTED_BOARD_BOOT
 # is set via root Makefile, but Renesas support Trusted-Boot without