V4L/DVB (6649): Add support for the DViCO FusionHDTV Dual Digital 4

Add support for DViCO's Dual Digital 4 with xc3028 tuner, zl10353 DVB-T
demodulator and a new-style I2C IR remote control receiver.

This would not have been possible without the work of and advice from
Mike Krufky, who originally got the Dual Digital 4 and second-gen DVB-T
NANO devices working with the out-of-tree XC3028 driver.

I converted it to use the in-tree XC3028 driver (after making it suitable
for our use), and added the IR remote control support based on his advice.

NB: a firmware package is required to use this device.

Signed-off-by: Chris Pascoe <c.pascoe@itee.uq.edu.au>
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 79ca7ab..4768a2c 100644
--- a/drivers/media/dvb/dvb-usb/cxusb.h
+++ b/drivers/media/dvb/dvb-usb/cxusb.h
@@ -5,6 +5,8 @@
 #include "dvb-usb.h"
 
 /* usb commands - some of it are guesses, don't have a reference yet */
+#define CMD_BLUEBIRD_GPIO_RW 0x05
+
 #define CMD_I2C_WRITE     0x08
 #define CMD_I2C_READ      0x09