AMD binary PI: add southbridge support for fan control

1. Add functions to support fan control.
2. When IMC firmware is added, the current firmwares' layout
cause build error. There is not enough space to add some firmwares,
so HUDSON_PSP_OFFSET is added to fix this problem.

Change-Id: Ie470a88cb9da256d9f72ea56bf268c15df195784
Signed-off-by: WANG Siyuan <wangsiyuanbuaa@gmail.com>
Signed-off-by: WANG Siyuan <SiYuan.Wang@amd.com>
Reviewed-on: http://review.coreboot.org/10720
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
5 files changed