Fix the lm78 VID reading, which I accidentally broke while making
this driver use the common vid_from_reg function rather than
reimplementing its own in 2.6.14-rc1.

I'm not proud of it, trust me.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>