[PATCH] nvidiafb: Fix bug in nvidiafb_pan_display

nvidiafb_pan_display() is incorrectly using the fields in info->var instead
of var passed to the function.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>