[media] soc_camera/mx2_camera: Fix warnings related to spacing

Fixes the following checkpatch warnings:
WARNING: unnecessary whitespace before a quoted newline
WARNING: please, no space before tabs

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>