Improve coreboot build output and eliminate some warnings:

Improve coreboot build output and eliminate some warnings:

 - Add static and const where possible.

 - Turn some #warning entries into TODO comments.

 - Add missing prototypes.

 - Remove unused variables.

 - Fix printf arguments or cast them as needed.

 - Make sconfig output look better. Drop useless "PARSED THE TREE" output.

 - Print "(this may take a while)" while building romcc. Add missing "\n".

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Myles Watosn <mylesgw@gmail.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4874 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1