media: atomisp: fix a brace coding sytle issue

Removed braces in 'if else' condition as it only consists of
one line each and according to coding style rules , in this case
the braces are not required.

Signed-off-by: Ankit Baluni <b18007@students.iitmandi.ac.in>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>