[media] tvp5150: replace video standard "magic" numbers

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[media] tvp5150: Add video format registers configuration values

Added constants for each video standard supported by TVP5150, so this patch
get rid of the magic numbers.

Signed-off-by: Javier Martinez Canillas <martinez.javier@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>