[coreboot] [PATCH]First attempt at eliminating #include *.c

[Patrick Georgi]

Hi,

attached patch removes several "#include *.c" from romstage.c in i945
based boards and moves those files to romstage-srcs instead (ie.
separate compilation units).

There's one global change, the removal of ramtest.c from CAR romstage.cs

It's abuild tested and boot tested on kontron/986lcd-m. Probably should
be tested (so that ramtest.c stuff is a separate patch), but the global
changes were actually the last change I made.

Signed-off-by: Patrick Georgi