V4L/DVB (3788): Fix compilation with V4L1_COMPAT

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index 18b8442..9debef9 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -88,3 +88,5 @@
 obj-$(CONFIG_VIDEO_VIVI) += vivi.o
 
 EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
+extra-cflags-$(CONFIG_VIDEO_V4L1_COMPAT) += -DCONFIG_VIDEO_V4L1_COMPAT
+