soc/intel/apollolake: Correct PCI write size in romstage
1. PCI command reg write should be 16-bit.
2. HPTC reg write should be 8-bit. Also, use macros instead of
hard-coded values. Currently, the macros are defined in romstage.c,
but if more P2SB macros are added, it would be good to move them to a
separate header file.
Change-Id: Iad1eb6a95467a41ecf454092808d357425c4c2fc
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/14613
Tested-by: build bot (Jenkins)
Reviewed-by: Andrey Petrov <andrey.petrov@intel.com>