refactor(plat/ea_handler): Use default ea handler implementation for panic

Put default ea handler implementation into function plat_default_ea_handler()
which just print verbose information and panic, so it can be called also
from overwritten / weak function plat_ea_handler() implementation.

Replace every custom implementation of printing verbose error message of
external aborts in custom plat_ea_handler() functions by a common
implementation from plat_default_ea_handler() function.

Signed-off-by: Pali Rohár <pali@kernel.org>
Change-Id: I15897f61b62b4c3c29351e693f51d4df381f3b98
diff --git a/plat/renesas/common/rcar_common.c b/plat/renesas/common/rcar_common.c
index 95e1f61..df4c30c 100644
--- a/plat/renesas/common/rcar_common.c
+++ b/plat/renesas/common/rcar_common.c
@@ -60,11 +60,7 @@
 	if (fixed)
 		return;
 
-	ERROR("Unhandled External Abort received on 0x%lx at EL3!\n",
-			read_mpidr_el1());
-	ERROR(" exception reason=%u syndrome=0x%llx\n", ea_reason, syndrome);
-
-	panic();
+	plat_default_ea_handler(ea_reason, syndrome, cookie, handle, flags);
 }
 
 #include <drivers/renesas/rcar/console/console.h>