 DONE write to 82c registers from driver
 DONE open /dev/video0 if 48 returns ENODEV and check id.
 DONE Try to fail sensibly in PutImage
 DONE define better structure for ioctl
 DONE Buffer allocation for stream in driver
 DONE Compiler warnings
 DONE Apply to latest ivtv source
 DONE Make ivtv_xv cope with NTSC (don't hard code 576)
 DONE vsync wakeup for dma_to_device_vsync
make ioctl fail if bad type
do ioctl with bad type and make sure it fails appropriatly to detect correct driver.
