V4L/DVB (8147): cxusb: add initial support for AVerTVHD Volar

Add initial support for this device. The AGC and tracking filter
settings for the mxl5003 are known to be wrong, but it generally works.

Signed-off-by: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/dvb/dvb-usb/cxusb.h b/drivers/media/dvb/dvb-usb/cxusb.h
index 4768a2c..1a51eaf 100644
--- a/drivers/media/dvb/dvb-usb/cxusb.h
+++ b/drivers/media/dvb/dvb-usb/cxusb.h
@@ -20,6 +20,9 @@
 #define CMD_STREAMING_ON  0x36
 #define CMD_STREAMING_OFF 0x37
 
+#define CMD_AVER_STREAM_ON  0x18
+#define CMD_AVER_STREAM_OFF 0x19
+
 #define CMD_GET_IR_CODE   0x47
 
 #define CMD_ANALOG        0x50