From: Michael Hunold <hunold@linuxtv.org>

fix a bunch of race conditions and locking bugs in video and vbi capture
code on device closure

use vmalloc_32() instead of vmalloc() in saa7146_vmalloc_build_pgtable().
this makes sure that the pagetable is in lowmem kernel memory

i2c timeout fix by Gerd Knorr 

SAA7146_I2C_SHORT_DELAY flag to speed up I2C access by Oliver Endriss

move saa7146_set_gpio() from saa7146_vv to saa7146_core, it's needed by DVB
budget drivers

add "new" saa7146_wait_for_debi_done() function, remove other versions from
av7110 and budget.ci

make budget-ci use this gpio function and the new wait_...() function,

make saa7146_pgtable_build_single() deliver a return code, make sanity
checks of the arguments

sanitize enabling of video input pins and i2c pins, use some default
values, so the hardware is always in a sane state

remove SAA7146_EXT_SWAP_ODD_EVEN flag + handling, fix the hardware
initialization instead

change minimal picture size to 48x32 just like other drivers

set up arbitrition control for video dma3 correctly

remove unnecessary code for capture to framebuffer memory, it's handled in
the generic code