use if and else instead of if(A) and if (!A).
Signed-off-by: NWan Jiabing <wanjiabing@vivo.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@kernel.org>