V4L/DVB (5791): Fix Kbuild for kbd-ir-i2c

Potentially, all board types with I2C and IR support can use an i2c
based IR. Currently, the driver is selected only if bt848 or saa7134
boards are selected.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/Kconfig b/drivers/media/Kconfig
index 624b21c..d9d033e 100644
--- a/drivers/media/Kconfig
+++ b/drivers/media/Kconfig
@@ -80,8 +80,12 @@
 config VIDEO_BTCX
 	tristate
 
+config VIDEO_IR_I2C
+	tristate
+
 config VIDEO_IR
 	tristate
+	select VIDEO_IR_I2C if I2C
 
 config VIDEO_TVEEPROM
 	tristate