Split the two usages of __ROMCC__:

Split the two usages of __ROMCC__:
__ROMCC__ now means "Don't use prototypes, since romcc doesn't support them."
__PRE_RAM__ means "Use simpler versions of functions, and no device tree."

There are probably some places where both are tested, but only one is needed.

Signed-off-by: Myles Watson <mylesgw@gmail.com>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4921 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1