intel/apollolake: Add CBMEM console to GNVS

CBMEM console stores all the console logs in CBMEM. Address of this
location in CBMEM where console logs are stored needs to be passed up to
OS using GNVS.

1. Add CBMC to GNVS fields in globalnvs.asl
2. Add cbmc member to global_nvs_t structure in nvs.h
3. Initialize gnvs->cbmc to address of cbmem console

BUG=chrome-os-partner:54342

Change-Id: Idcd4573e626fa433c1623bdcbe29921de64539b2
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15177
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
diff --git a/src/soc/intel/apollolake/acpi.c b/src/soc/intel/apollolake/acpi.c
index c950255..d24416f 100644
--- a/src/soc/intel/apollolake/acpi.c
+++ b/src/soc/intel/apollolake/acpi.c
@@ -144,6 +144,9 @@
 
 static void acpi_create_gnvs(struct global_nvs_t *gnvs)
 {
+	if (IS_ENABLED(CONFIG_CONSOLE_CBMEM))
+		gnvs->cbmc = (uintptr_t)cbmem_find(CBMEM_ID_CONSOLE);
+
 	if (IS_ENABLED(CONFIG_CHROMEOS)) {
 		/* Initialize Verified Boot data */
 		chromeos_init_vboot(&gnvs->chromeos);