layerscape: do not add custom CFLAGS.

The selected CFLAGS are already set by default.

Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/layerscape/64b/target.mk

@@ -7,7 +7,6 @@
 
 ARCH:=aarch64
 BOARDNAME:=layerscape 64b boards
-CFLAGS:=-Os -pipe -fno-caller-saves
 
 define Target/Description
 	Build firmware images for $(BOARDNAME) SoC devices.