RAS: Move EA handling to a separate file

A new file ea_delegate.S is introduced, and all EA-related functions are
moved into it. This makes runtime_exceptions.S less crowded and reads
better.

No functional changes.

Change-Id: I64b653b3931984cffd420563f8e8d1ba263f329f
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
diff --git a/bl31/bl31.mk b/bl31/bl31.mk
index 307ddab..bff9653 100644
--- a/bl31/bl31.mk
+++ b/bl31/bl31.mk
@@ -19,6 +19,7 @@
 				bl31/interrupt_mgmt.c				\
 				bl31/aarch64/bl31_entrypoint.S			\
 				bl31/aarch64/crash_reporting.S			\
+				bl31/aarch64/ea_delegate.S			\
 				bl31/aarch64/runtime_exceptions.S		\
 				bl31/bl31_context_mgmt.c			\
 				common/runtime_svc.c				\