V4L/DVB (10704): zoran: remove broken BIGPHYS_AREA and BUZ_HIMEM code, and allow for kmallocs > 128 kB

Remove memory allocation madness.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>