[media] Speed up DVB TS stream delivery from DMA buffer into dvb-core's buffer
[media] Speed up DVB TS stream delivery from DMA buffer into dvb-core's buffer

Avoid unnecessary DVB TS 188 sized packet copying from DMA buffer into stack.
Backtrack one 188 sized packet just after some garbage bytes when possible.
This obsoletes patch https://patchwork.kernel.org/patch/118147/

Signed-off-by: Marko Ristola <3190af65dd58992da1cff85dac5ba68a1651a434@kolumbus.fi>
Acked-by: Andreas Oberritter <5c504a8ae171602809046bde94878da7dbc4e5ab@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@redhat.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs