Cleanup the messy code. The code left in main is all about filling
tables.
To help to do this,
1. Some local variables are put into global struct.
2. Add some functions. Set some functions to global.
TEST=Identical test on all AMD platforms
Change-Id: Ia25c3fd5de7ae48054359f0f6551d91d7a4f6828
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78311
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
