[media] media: pci: saa7164: remove dead code

Remove dead code. The following line of code is never reached:
return SAA_OK;

Addresses-Coverity-ID: 114283

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Reviewed-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>