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/nvidia/tegra/soc/t194/plat_ras.c b/plat/nvidia/tegra/soc/t194/plat_ras.c
index 0c4c6fa..a322403 100644
--- a/plat/nvidia/tegra/soc/t194/plat_ras.c
+++ b/plat/nvidia/tegra/soc/t194/plat_ras.c
@@ -493,9 +493,6 @@
 #if RAS_EXTENSION
 	tegra194_ea_handler(ea_reason, syndrome, cookie, handle, flags);
 #else
-	ERROR("Unhandled External Abort received on 0x%llx at EL3!\n",
-			read_mpidr_el1());
-	ERROR(" exception reason=%u syndrome=0x%lx\n", ea_reason, syndrome);
-	panic();
+	plat_default_ea_handler(ea_reason, syndrome, cookie, handle, flags);
 #endif
 }