ACPI: Select ACPI_SOC_NVS only where suitable

Having some symmetry with <soc/nvs.h> now allows to reduce
the amount of gluelogic to determine the size and cbmc field
of struct global_nvs.

Since GNVS creation is now controlled by ACPI_SOC_NVS,
drivers/amd/agesa/nvs.c becomes obsolete and soc/amd/cezanne
cannot have this selected until <soc/nvs.h> exists.

Change-Id: Ia9ec853ff7f5e7908f7e8fc179ac27d0da08e19d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49344
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Lance Zhao

src/southbridge/intel/lynxpoint/serialio.c

@@ -7,10 +7,10 @@
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
+#include <soc/nvs.h>
 #include "chip.h"
 #include "iobp.h"
 #include "pch.h"
-#include "nvs.h"
 
 /* Enable clock in PCI mode */
 static void serialio_enable_clock(struct resource *bar0)