[coreboot] [PATCH] let high memory size be decided in cbmem.h

[Rudolf Marek]

Hi all,

We hardcode highmemory size in  every northbridge! This is bad, and especially 
if suspend to ram is involved. Let the default be taken from cbmem.h which also 
handles the suspend logic.

Abuild tested. Please check all changes if I did not make any wrong while 
converting this to bytes.

Signed-off-by: Rudolf Marek

Thanks,
Rudolf