lynxpoint: Add helper functions for reading PM and GPIO base

These base addresses are used in several places and it
is helpful to have one location that is reading it.

Change-Id: Ibf589247f37771f06c18e3e58f92aaf3f0d11271
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/2812
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/southbridge/intel/lynxpoint/pch.h b/src/southbridge/intel/lynxpoint/pch.h
index 38202b5..db9bb77 100644
--- a/src/southbridge/intel/lynxpoint/pch.h
+++ b/src/southbridge/intel/lynxpoint/pch.h
@@ -130,7 +130,8 @@
 int pch_silicon_revision(void);
 int pch_silicon_type(void);
 int pch_is_lp(void);
-
+u16 get_pmbase(void);
+u16 get_gpiobase(void);
 #if !defined(__PRE_RAM__) && !defined(__SMM__)
 #include <device/device.h>
 #include <arch/acpi.h>