V4L/DVB (7593): em28xx: add a module to handle dvb

This patch adds em28xx-dvb. This driver is highly based on cx88-dvb and
saa7134-dvb.

This code currently loads and unloads successfully. However, some
changes are needed to properly support the mpeg streams and to setup
em28xx to work on DVB mode.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/em28xx/Makefile b/drivers/media/video/em28xx/Makefile
index 0924550..3d1c3cc 100644
--- a/drivers/media/video/em28xx/Makefile
+++ b/drivers/media/video/em28xx/Makefile
@@ -5,6 +5,7 @@
 
 obj-$(CONFIG_VIDEO_EM28XX) += em28xx.o
 obj-$(CONFIG_VIDEO_EM28XX_ALSA) += em28xx-alsa.o
+obj-$(CONFIG_VIDEO_EM28XX_DVB) += em28xx-dvb.o
 
 EXTRA_CFLAGS += -Idrivers/media/video
 EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core