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/i82801gx/lpc.c

@@ -21,10 +21,10 @@
 #include <southbridge/intel/common/hpet.h>
 #include <southbridge/intel/common/pmbase.h>
 #include <southbridge/intel/common/spi.h>
+#include <soc/nvs.h>
 
 #include "chip.h"
 #include "i82801gx.h"
-#include "nvs.h"
 
 #define NMI_OFF	0
 
@@ -464,11 +464,6 @@ static void lpc_final(struct device *dev)
 	outb(POST_OS_BOOT, 0x80);
 }
 
-size_t gnvs_size_of_array(void)
-{
-	return sizeof(struct global_nvs);
-}
-
 void soc_fill_gnvs(struct global_nvs *gnvs)
 {
 	gnvs->apic = 1;