Tegra: enable SDEI handling

This patch enables SDEI support for all Tegra platforms, with
the following configuration settings.

* SGI 8 as the source IRQ
* Special Private Event 0
* Three private, dynamic events
* Three shared, dynamic events
* Twelve general purpose explicit events

Verified using TFTF SDEI test suite.

******************************* Summary *******************************
 Test suite 'SDEI'                                               Passed
 =================================
 Tests Skipped : 0
 Tests Passed  : 5
 Tests Failed  : 0
 Tests Crashed : 0
 Total tests   : 5
 =================================

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Change-Id: I1922069931a7876a4594e53260ee09f2e4f09390
diff --git a/plat/nvidia/tegra/platform.mk b/plat/nvidia/tegra/platform.mk
index aedd3c6..3d61f06 100644
--- a/plat/nvidia/tegra/platform.mk
+++ b/plat/nvidia/tegra/platform.mk
@@ -52,6 +52,9 @@
 # Enable stack protection
 ENABLE_STACK_PROTECTOR		:=	strong
 
+# Enable SDEI
+SDEI_SUPPORT			:= 1
+
 include plat/nvidia/tegra/common/tegra_common.mk
 include ${SOC_DIR}/platform_${TARGET_SOC}.mk
 
@@ -66,6 +69,7 @@
 
 # override with necessary libc files for the Tegra platform
 override LIBC_SRCS :=	$(addprefix lib/libc/,		\
+			aarch64/setjmp.S		\
 			assert.c			\
 			memcpy.c			\
 			memmove.c			\