V4L/DVB (9430): stb0899: avoid parameter overwriting

BUG! Setting CRL parameter overwrote the CR Algorithm type,
eventually leading to wrong search algorithm to be employed in
the DVB-S carrier loop optimization.

Symptom: Once the CR optimization stage is passed either way, in
a successful or failed manner, the very next carrier search will
fail, due to no Carrier Search Algorithm specified.

Signed-off-by: Arvo Jarve <arvo@softshark.ee>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>