drivers/video/s1d13xxxfb.c: fix build as module with dbg

Attached patch fixes two compilation problems of s1d13xxxfb.c:

- Fixes outdated dbg() message to fix compilation error with debugging enabled.

- Do not read kernel command line options when compiled as module.

Signed-off-by: Stanislav Brabec <utx@penguin.cz>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>