ACPI GNVS: Replace uses of smm_get_gnvs()

Change-Id: I7b657750b10f98524f011f5254e533217fe94fd8
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42849
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/southbridge/intel/ibexpeak/smihandler.c

@@ -23,15 +23,6 @@
 #include <southbridge/intel/common/gpio.h>
 #include <southbridge/intel/common/pmutil.h>
 
-/* GNVS needs to be updated by an 0xEA PM Trap (B2) after it has been located
- * by coreboot.
- */
-static struct global_nvs *gnvs;
-struct global_nvs *smm_get_gnvs(void)
-{
-	return gnvs;
-}
-
 int southbridge_io_trap_handler(int smif)
 {
 	switch (smif) {