[media] vivid-tpg: precalculate colorspace/xfer_func combinations

Precalculate all the colorspace/transfer function combinations in order
to easily generate the correct colors.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>