media: af9033: Remove duplicated switch statement

The switch before set is_af9035 or is_it9135 which makes the second
switch redundant. Keeping the comment as to avoid sleep on IT9135.

Signed-off-by: Victor Toso <me@victortoso.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>