nb/intel/sandybridge: Fill in DIMM serial number

Fill in SMBIOS type 17 DIMM serial number, read from SPD.

Fixes FWTS SMBIOS type 17 test.

Change-Id: Id6e818bfdf4af0fd34af56dc23df052a3f8c348d
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/28191
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/device/dram/ddr3.c

@@ -398,6 +398,8 @@ int spd_decode_ddr3(dimm_attr * dimm, spd_raw_data spd)
 	memcpy(dimm->part_number, &spd[128], 16);
 	printram("  Part number        : %s\n", dimm->part_number);
 
+	memcpy(dimm->serial, &spd[SPD_DIMM_SERIAL_NUM], SPD_DIMM_SERIAL_LEN);
+
 	return ret;
 }