soc/intel/xeon_sp: Add acpigen_write_PRT_pre_routed

soc/intel/xeon_sp: Add acpigen_write_PRT_pre_routed

acpigen_write_PRT_pre_routed writes _PRT covering all direct
subordinate child devices based on interrupt line/pin info from
their PCI configuration spaces. It is required that IRQ routing
and PCI configuration space update to be done ahead of time.

TEST=Build and boot on intel/archercity CRB

Change-Id: Ic54888f76d2ec9804442bec5aec54267d9a16d7c
Signed-off-by: Lu, Pen-ChunX <pen-chunx.lu@intel.com>
Signed-off-by: Shuo Liu <shuo.liu@intel.com>
Signed-off-by: Jincheng Li <jincheng.li@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82253
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>