V4L/DVB (4929): Read() implementation + format set/get simplifications
V4L/DVB (4929): Read() implementation + format set/get simplifications

- implement read() entry point that works with linux list.h
- rework of VIDIOC_ENUM_FMT/VIDIOC_S_FMT/VIDIOC_G_FMT
- VIDIOC_STREAMON : allows streaming whereas there is no queued buffer
(xdtv does VIDIOC_STREAMON before VIDIOC_QBUFs)

Signed-off-by: Thierry MERLE <19404bbcc71a55fa4c9f5c68eb13c58fdc74f285@free.fr>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@infradead.org>

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