Rewrite and filling of libc/ctype.c (thus adjusting copyright line).

Rewrite and filling of libc/ctype.c (thus adjusting copyright line).

Use a simple one-liner for each of the functions. You can surely optimize
the code some more, but I chose not to do that in order to keep it readable.
When compiling with -Os the size differences are minimal.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Jordan Crouse <jordan.crouse@amd.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3236 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1