intel/kunimitisu: set oem_id oem_table_id fields of acpi_header_t

kunimitisu platform updated these two fields if maxim codec
is detected.

BUG=chrome-os-partner:49570
BRANCH=glados
TEST=Build & Booted kunimitsu board. Verified that kernel
can read new strings.

Change-Id: Icbe0d87f0b46da794db36191b0e12948fe6a2fe6
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: f3d07ef07c382a2df140b457273feb3899228e10
Original-Change-Id: Ia6a111d15b851ae3fa918816e13b54ace215a09a
Original-Signed-off-by: Fang, Yang A <yang.a.fang@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/324631
Original-Commit-Ready: Yang Fang <yang.a.fang@intel.com>
Original-Tested-by: Yang Fang <yang.a.fang@intel.com>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/13603
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/intel/kunimitsu/mainboard.c b/src/mainboard/intel/kunimitsu/mainboard.c
index 4bbd4e3..d634fac 100644
--- a/src/mainboard/intel/kunimitsu/mainboard.c
+++ b/src/mainboard/intel/kunimitsu/mainboard.c
@@ -20,10 +20,14 @@
 #include <device/device.h>
 #include <gpio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <soc/nhlt.h>
 #include "ec.h"
 #include "gpio.h"
 
+static const char *oem_id_maxim = "INTEL";
+static const char *oem_table_id_maxim = "SCRDMAX";
+
 static void mainboard_init(device_t dev)
 {
 	mainboard_ec_init();
@@ -42,6 +46,8 @@
 		uintptr_t start_addr;
 		uintptr_t end_addr;
 		struct nhlt *nhlt;
+		const char *oem_id = NULL;
+		const char *oem_table_id = NULL;
 
 		start_addr = current;
 
@@ -67,13 +73,17 @@
 			/* MAXIM Smart Amps for left and right. */
 			if (nhlt_soc_add_max98357(nhlt, AUDIO_LINK_SSP0))
 				printk(BIOS_ERR, "Couldn't add max98357.\n");
+
+			oem_id = oem_id_maxim;
+			oem_table_id = oem_table_id_maxim;
 		}
 
 		/* NAU88l25 Headset codec. */
 		if (nhlt_soc_add_nau88l25(nhlt, AUDIO_LINK_SSP1))
 			printk(BIOS_ERR, "Couldn't add headset codec.\n");
 
-		end_addr = nhlt_soc_serialize(nhlt, start_addr);
+		end_addr = nhlt_soc_serialize_oem_overrides(nhlt, start_addr,
+						 oem_id, oem_table_id);
 
 		if (end_addr != start_addr)
 			acpi_add_table(rsdp, (void *)start_addr);