media: vpss: fix the order of resource clean up

Clean up of resources should be in reverse order of vpss_init().
Fix this inside vpss_exit().

Signed-off-by: Mukesh Ojha <mojha@codeaurora.org>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>