soc/intel/broadwell/pch: Prepare to drop `gpio.h`

Use `lp_gpio.h` from Lynxpoint instead. Subsequent commits will update
the mainboards and then drop all GPIO code from Broadwell.

Tested with BUILD_TIMELESS=1, Google Tidus remains identical.

Change-Id: Idef89037c2ca781ac3e921abb4b3dc3f7c4b3b5f
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50079
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/broadwell/pch/pmutil.c b/src/soc/intel/broadwell/pch/pmutil.c
index be383277..59ae72f 100644
--- a/src/soc/intel/broadwell/pch/pmutil.c
+++ b/src/soc/intel/broadwell/pch/pmutil.c
@@ -17,10 +17,12 @@
 #include <soc/lpc.h>
 #include <soc/pci_devs.h>
 #include <soc/pm.h>
-#include <soc/gpio.h>
 #include <security/vboot/vbnv.h>
 #include <stdint.h>
 
+#define GPIO_ALT_GPI_SMI_STS	0x50
+#define GPIO_ALT_GPI_SMI_EN	0x54
+
 static inline uint16_t get_gpiobase(void)
 {
 	return GPIO_BASE_ADDRESS;