[media] em28xx: simplify IR names on I2C devices

The ir-i2c-kbd already adds I2C IR before the name. The way it is,
the devices are named as:
	"i2c IR (i2c IR (EM2840 Hauppaug"
With is ugly and incorrect. After this patch, it is now properly
displayed as:
	"i2c IR (WinTV USB2)"

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>