linux-imx

media: vim2m: ensure that width is multiple of two

The copy logic assumes that the data width is multiple of two,
as this is needed in order to support YUYV.

There's no reason to force it to be 8-pixel aligned, as 2-pixel
alignment is enough.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>