include/target: move specific cflags to own Makefile

Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>

include/target.mk

@@ -207,9 +207,6 @@ ifeq ($(DUMP),1)
   endif
   ifeq ($(ARCH),aarch64)
     CPU_TYPE ?= generic
-    ifneq ($(filter $(FEATURES),fpu),)
-      CPU_CFLAGS += -march=armv8-a+crypto
-    endif
     CPU_CFLAGS_generic = -mcpu=generic
     CPU_CFLAGS_cortex-a53 = -mcpu=cortex-a53
   endif

package/libs/mbedtls/Makefile

@@ -122,6 +122,9 @@ PKG_INSTALL:=1
 
 TARGET_CFLAGS += -ffunction-sections -fdata-sections
 TARGET_CFLAGS := $(filter-out -O%,$(TARGET_CFLAGS))
+ifneq ($(CONFIG_LIBMBEDTILS_HAVE_ARMV8CE_AES),)
+  TARGET_CFLAGS := $(filter-out -march=%,$(TARGET_CFLAGS)) -march=armv8-a+crypto
+endif
 
 CMAKE_OPTIONS += \
 	-DUSE_SHARED_MBEDTLS_LIBRARY:Bool=ON \