V4L/DVB (3197a): IR keymaps are exported by the ir-common module now

Moved keymaps to the ir-common module, and export them from there, instead
of #including them in each module

Included missing files from V4L/DVB(3197).

Signed-off-by: Ricardo Cerqueira <v4l@cerqueira.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>