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/include/device/dram/ddr3.h

@@ -174,6 +174,8 @@ typedef struct dimm_attr_st {
 	u16 manufacturer_id;
 	/* ASCII part number - NULL terminated */
 	u8 part_number[17];
+	/* Serial number */
+	u8 serial[SPD_DIMM_SERIAL_LEN];
 } dimm_attr;
 
 enum ddr3_xmp_profile {