SPD: Add CAS latency 2

CAS latency = 2 support added for DDR2.

Change-Id: I08d72a61c27ff0eab19e500a2f547a5e946de2f0
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/15439
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/include/spd.h b/src/include/spd.h
index 6424d33..0bc7898 100644
--- a/src/include/spd.h
+++ b/src/include/spd.h
@@ -147,6 +147,7 @@
 #define SPD_CAS_LATENCY_3_5              0x20
 #define SPD_CAS_LATENCY_4_0              0x40
 
+#define SPD_CAS_LATENCY_DDR2_2		(1 << 2)
 #define SPD_CAS_LATENCY_DDR2_3		(1 << 3)
 #define SPD_CAS_LATENCY_DDR2_4		(1 << 4)
 #define SPD_CAS_LATENCY_DDR2_5		(1 << 5)