media: vidtv: psi: fix missing crc for PMT

The PMT write function was refactored and this broke the CRC computation.

Fix it.

Fixes: db9569f6 ("media: vidtv: cleanup PMT write table function")
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>