[coreboot] [PATCH] Make hidden configuration flags visible (i945)

[Patrick Georgi]

Hi,

attached patch moves several config flags that, for historical reasons,
were put in romstage.c into Kconfig.

This ensures that all parts of the coreboot build on affected boards
have a chance to use these flags, which will be useful when removing
.c-includes in romstage.c

It's also a first step towards removing yet another config system
(manual #defines) from the tree.

Maybe these flags could be done away with somehow, maybe they should be
declared in other parts of the tree (eg. chipset). This is a first safe
step, so I didn't think too much about moving them elsewhere.

Signed-off-by: Patrick Georgi