media: vicodec: Validate version dependent header values in a separate function

Move the code that validates version dependent header
values to a separate function 'validate_by_version'

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>