soc/amd: Rename to soc_fill_gnvs()

Replace acpi_create_gnvs() under soc/ to reflect their
changed functionality.

Change-Id: I61010f64a4a935f238e6dcd0f8c1340a6cc68eb4
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44024
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jason Glenesk <jason.glenesk@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/include/acpi/acpi_gnvs.h

@@ -26,13 +26,10 @@ struct device;
 void southbridge_inject_dsdt(const struct device *device);
 
 /*
- * This function populates the gnvs structure in acpi table.
+ * These functions populate the gnvs structure in acpi table.
  * Defined as weak in common acpi as gnvs structure definition is
  * chipset specific.
  */
-
-void acpi_create_gnvs(struct global_nvs *gnvs);
-
 void soc_fill_gnvs(struct global_nvs *gnvs);
 void mainboard_fill_gnvs(struct global_nvs *gnvs);