media: staging: media: atomisp: balance braces around if...else block

Balance braces around the if else blocks as per the code style guidelines.
Add braces to branches where it is missing. Resolves checkpatch script
CHECK / WARNING feedback messages.

Signed-off-by: Deepak R Varma <drv@mailo.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>