[coreboot] Strange ROMCC failure with Rev 5623

[Myles Watson]

When compiling asus/p2b (and several others), Rev 5622 succeeds, but 5623 fails.

make: *** [build/mainboard/asus/p2b/romstage.inc] Segmentation fault
make: *** Deleting file `build/mainboard/asus/p2b/romstage.inc'

The only difference for these boards is this line in config.h:

#define CONFIG_VENDOR_ECS 0

Removing this line lets 5623 build correctly.

Is there some limit on the length of this file?  The number of
#defines?  I'm using the reference compiler to compile romcc.

Thanks,
Myles