include/smbios: Update SMBIOS memory structures to version 2.8

Change-Id: Icda915933c4ebf3a735d9e1d4e4dbb1138a06b39
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/11955
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Tested-by: build bot (Jenkins)
diff --git a/src/include/smbios.h b/src/include/smbios.h
index b654c23..fdb7bbd 100644
--- a/src/include/smbios.h
+++ b/src/include/smbios.h
@@ -409,9 +409,11 @@
 	u8 asset_tag;
 	u8 part_number;
 	u8 attributes;
-	u16 extended_size;
+	u32 extended_size;
 	u16 clock_speed;
-
+	u16 minimum_voltage;
+	u16 maximum_voltage;
+	u16 configured_voltage;
 	char eos[2];
 } __attribute__((packed));