[PATCH] atyfb: Fix kconfig error

Fix the following compile error:

  MODPOST 327 modules
WARNING: "aty_st_lcd" [drivers/video/aty/atyfb.ko] undefined!
WARNING: "aty_ld_lcd" [drivers/video/aty/atyfb.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2

Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>