media: saa7164: Remove redundant assignment of pointer t

The pointer t is being assigned a value that is never read, it is being
updated later on inside the for-loop. The assignment is redundant and
can be removed.

Addresses-Coverity: ("Unused value")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>