soc/intel: Replace acpi_init_gnvs()

Rename these to soc_fill_gnvs() and move the callsite away
from mb/.

Change-Id: I760c36f65c6122103f2be98fc11ee13832c2772e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48716
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/acpi/acpi_gnvs.h

@@ -32,7 +32,6 @@ void southbridge_inject_dsdt(const struct device *device);
  */
 
 void acpi_create_gnvs(struct global_nvs *gnvs);
-void acpi_init_gnvs(struct global_nvs *gnvs);
 
 void soc_fill_gnvs(struct global_nvs *gnvs);
 void mainboard_fill_gnvs(struct global_nvs *gnvs);