mb/*/*{haswell}: Link gpio.c and add a const global for lp variant

This is similar to how sb/common/intel handles it. The advantage is
that the gpio configuration does not need to be passed on that much.

Change-Id: I6d07f0d4d3aaf4e8662d6f7dc8238d14a16fd04d
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
---
M src/cpu/intel/haswell/haswell.h
M src/cpu/intel/haswell/romstage.c
M src/mainboard/asrock/h81m-hds/romstage.c
M src/mainboard/google/beltino/Makefile.inc
M src/mainboard/google/beltino/romstage.c
R src/mainboard/google/beltino/variants/mccloud/gpio.c
R src/mainboard/google/beltino/variants/monroe/gpio.c
R src/mainboard/google/beltino/variants/panther/gpio.c
R src/mainboard/google/beltino/variants/tricky/gpio.c
R src/mainboard/google/beltino/variants/zako/gpio.c
M src/mainboard/google/slippy/Makefile.inc
R src/mainboard/google/slippy/variants/falco/gpio.c
M src/mainboard/google/slippy/variants/falco/romstage.c
R src/mainboard/google/slippy/variants/leon/gpio.c
M src/mainboard/google/slippy/variants/leon/romstage.c
R src/mainboard/google/slippy/variants/peppy/gpio.c
M src/mainboard/google/slippy/variants/peppy/romstage.c
R src/mainboard/google/slippy/variants/wolf/gpio.c
M src/mainboard/google/slippy/variants/wolf/romstage.c
M src/mainboard/intel/baskingridge/Makefile.inc
R src/mainboard/intel/baskingridge/gpio.c
M src/mainboard/intel/baskingridge/romstage.c
M src/mainboard/lenovo/t440p/romstage.c
M src/mainboard/supermicro/x10slm-f/romstage.c
M src/southbridge/intel/lynxpoint/early_pch.c
M src/southbridge/intel/lynxpoint/lp_gpio.h
M src/southbridge/intel/lynxpoint/pch.h
27 files changed, 25 insertions(+), 76 deletions(-)