Avoid a kernel crash in stifb by providing the correct pointer to the fb_info
struct. Prior to commit e2e0b838 ("video/sticore: Remove info field from
STI struct") the fb_info struct was at the beginning of the fb struct.

Fixes: e2e0b838 ("video/sticore: Remove info field from STI struct")
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Thomas Zimmermann <tzimmermann@suse.de>