Small curses fixes/additions for libpayload (trivial).

Small curses fixes/additions for libpayload (trivial).

 - Properly set LINES and COLS, needed for a real curses application.

 - Implement notimeout() and wtimeout(), which are trivial.

 - Implement a dummy flushinp() for now as it's needed by a curses
   application I'm porting, will be replaced by something useful later.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3224 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1