media: vidtv: remove unneeded variable make code cleaner

return value form directly instead of
taking this in another redundant variable.

Link: https://lore.kernel.org/linux-media/20211210024721.425145-1-chi.minghao@zte.com.cn


Reported-by: Zeal Robot <zealci@zte.com.cm>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>