soc/intel/skylake: Use common/block/gpio

Other than switch to use common gpio implementation for skylake based
platform, also apply the needed changes for purism board.

Change-Id: I06e06dbcb6d0d6fe277dfad57b82aca51f94b099
Signed-off-by: Hannah Williams <hannah.williams@intel.com>
Signed-off-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/19201
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Youness Alaoui <snifikino@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/skylake/chip.h

@@ -24,8 +24,8 @@
 #include <intelblocks/gspi.h>
 #include <intelblocks/lpss_i2c.h>
 #include <stdint.h>
-#include <soc/gpio_defs.h>
 #include <soc/gpe.h>
+#include <soc/gpio.h>
 #include <soc/irq.h>
 #include <soc/pci_devs.h>
 #include <soc/pmc.h>