Staging: cx25821: 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/cx25821/Makefile

@@ -7,7 +7,7 @@ cx25821-objs   := cx25821-core.o cx25821-cards.o cx25821-i2c.o \
 obj-$(CONFIG_VIDEO_CX25821) += cx25821.o
 obj-$(CONFIG_VIDEO_CX25821_ALSA) += cx25821-alsa.o
 
-EXTRA_CFLAGS += -Idrivers/media/video
-EXTRA_CFLAGS += -Idrivers/media/common/tuners
-EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
-EXTRA_CFLAGS += -Idrivers/media/dvb/frontends
+ccflags-y := -Idrivers/media/video
+ccflags-y += -Idrivers/media/common/tuners
+ccflags-y += -Idrivers/media/dvb/dvb-core
+ccflags-y += -Idrivers/media/dvb/frontends