fix(build): march handling with arch-features

Currently all march compiler option handling is moved to build
utility in march.mk.

We pass arch-features to build which appends to march options,
so this should be done once we decide march options and moving
it to march.mk file.

Change-Id: Ifaf99af5f371fd28db376a12657ccf4f363295c2
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
(cherry picked from commit 7275ac2af86277e2442ef4b0fee6c35cbe830056)
diff --git a/Makefile b/Makefile
index 9c4a838..9e5f519 100644
--- a/Makefile
+++ b/Makefile
@@ -163,15 +163,6 @@
 ################################################################################
 arch-features		=	${ARM_ARCH_FEATURE}
 
-# Set the compiler's architecture feature modifiers
-ifneq ($(arch-features), none)
-	# Strip "none+" from arch-features
-	arch-features	:=	$(subst none+,,$(arch-features))
-	march-directive	:=	$(march-directive)+$(arch-features)
-# Print features
-        $(info Arm Architecture Features specified: $(subst +, ,$(arch-features)))
-endif #(arch-features)
-
 ifneq ($(findstring clang,$(notdir $(CC))),)
 	ifneq ($(findstring armclang,$(notdir $(CC))),)
 		TF_CFLAGS_aarch32	:=	-target arm-arm-none-eabi
@@ -236,8 +227,6 @@
 TF_CFLAGS_aarch32	+=	-mno-unaligned-access
 TF_CFLAGS_aarch64	+=	-mgeneral-regs-only -mstrict-align
 
-ASFLAGS		+=	$(march-directive)
-
 ##############################################################################
 # WARNINGS Configuration
 ###############################################################################
@@ -692,6 +681,7 @@
 include ${MAKE_HELPERS_DIRECTORY}march.mk
 
 TF_CFLAGS   +=	$(march-directive)
+ASFLAGS		+=	$(march-directive)
 
 # This internal flag is common option which is set to 1 for scenarios
 # when the BL2 is running in EL3 level. This occurs in two scenarios -