V4L/DVB (3788): Fix compilation with V4L1_COMPAT

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/Makefile

@@ -88,3 +88,5 @@ obj-$(CONFIG_USB_VICAM)         += usbvideo/
 obj-$(CONFIG_VIDEO_VIVI) += vivi.o
 
 EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
+extra-cflags-$(CONFIG_VIDEO_V4L1_COMPAT) += -DCONFIG_VIDEO_V4L1_COMPAT
+