TFTF: Enable ARMv8.3-PAuth in FWU tests.

This patch adds ARMv8.3-PAuth  support for FWU tests.

Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Change-Id: I36a0a2a3870db51cda0a09bd8fd8004e2d01d2bc
diff --git a/Makefile b/Makefile
index 100e241..8f08b2f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+# Copyright (c) 2018-2020, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -225,6 +225,8 @@
 
 ifeq (${ENABLE_PAUTH},1)
 TFTF_CFLAGS		+= -mbranch-protection=pac-ret
+NS_BL1U_CFLAGS		+= -mbranch-protection=pac-ret
+NS_BL2U_CFLAGS		+= -mbranch-protection=pac-ret
 endif
 
 NS_BL1U_SOURCES		+= ${PLAT_SOURCES} ${LIBC_SRCS}