Staging: rt2860: Makefile: cleaned up Makefile cflag lines

Changed to use the proper ccflags-y option
Signed-off-by: NTracey Dent <tdent48227@gmail.com>
Acked-by: NSam Ravnborg <sam@ravnborg.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rt2860/Makefile

 obj-$(CONFIG_RT2860)	+= rt2860sta.o
 
 # TODO: all of these should be removed
-EXTRA_CFLAGS += -DLINUX -DAGGREGATION_SUPPORT -DPIGGYBACK_SUPPORT -DWMM_SUPPORT
-EXTRA_CFLAGS += -DRTMP_MAC_PCI -DRTMP_PCI_SUPPORT -DRT2860
-EXTRA_CFLAGS += -DRTMP_RF_RW_SUPPORT -DRTMP_EFUSE_SUPPORT -DRT30xx -DRT3090
-EXTRA_CFLAGS += -DDBG
+ccflags-y := -DLINUX -DAGGREGATION_SUPPORT -DPIGGYBACK_SUPPORT -DWMM_SUPPORT
+ccflags-y += -DRTMP_MAC_PCI -DRTMP_PCI_SUPPORT -DRT2860
+ccflags-y += -DRTMP_RF_RW_SUPPORT -DRTMP_EFUSE_SUPPORT -DRT30xx -DRT3090
+ccflags-y += -DDBG
 
 rt2860sta-objs :=	\
 	common/crypt_md5.o	\