media: platform: rename s5p-jpeg/ to samsung/s5p-jpeg/

As the end goal is to have platform drivers split by vendor,
rename s5p-jpeg/ to samsung/s5p-jpeg/.

Acked-by: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>