soc/intel/apollolake: Initialize processor count in GNVS

Initialize the PCNT variable in GNVS so it is available to ACPI code
that expects to know the number of CPUs.

Change-Id: I7a6e003ac94218061bf98e8883ed2c62d856af8d
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/16693
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/soc/intel/apollolake/acpi.c

@@ -168,6 +168,9 @@ static void acpi_create_gnvs(struct global_nvs_t *gnvs)
 	/* Set unknown wake source */
 	gnvs->pm1i = ~0ULL;
 
+	/* CPU core count */
+	gnvs->pcnt = dev_count_cpu();
+
 	if (!dev || !dev->chip_info) {
 		printk(BIOS_ERR, "BUG! Could not find SOC devicetree config\n");
 		return;