ACPI: Drop typedef global_nvs_t

Bring all GNVS related initialisation function to global
scope to force identical signatures. Followup work is
likely to remove some as duplicates.

Change-Id: Id4299c41d79c228f3d35bc7cb9bf427ce1e82ba1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42489
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/intel/harcuvar/acpi_tables.c

@@ -2,6 +2,7 @@
 
 #include <types.h>
 #include <acpi/acpi.h>
+#include <acpi/acpi_gnvs.h>
 #include <device/device.h>
 #include <cpu/x86/msr.h>
 
@@ -11,7 +12,7 @@
 
 extern const unsigned char AmlCode[];
 
-void acpi_create_gnvs(global_nvs_t *gnvs)
+void acpi_create_gnvs(struct global_nvs *gnvs)
 {
 	acpi_init_gnvs(gnvs);