Staging: vt6655: Makefile: cleaned up Makefile cflag lines

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

drivers/staging/vt6655/Makefile

 # TODO: all of these should be removed
-EXTRA_CFLAGS += -DLINUX -D__KERNEL__ -D__NO_VERSION__
-EXTRA_CFLAGS += -DHOSTAP
+ccflags-y := -DLINUX -D__KERNEL__ -D__NO_VERSION__
+ccflags-y += -DHOSTAP
 
 vt6655_stage-y +=	device_main.o \
 	card.o \