This patch just fixes some typos and adds retval documentation for some
functions that were missing it.

I've also a question here: skeletonfb says that xxxfb_setcolreg() should
return a negative errno on error.  However, if the register number being
accessed is out of bounds, 1 is returned.  Shouldn't it be better to return
-EINVAL instead?  By looking at fbcmap.c, the retval isn't being checked
against positive/negative values, so it doesn't make sense to return 1.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>