Added spaces around '<<' operator to improve readability and meet linux
kernel coding style.
Reported by checkpatch

Signed-off-by: Mitali Borkar <mitaliborkar810@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>