nb/intel/sandybridge: Use the MC_BIOS_DATA define

Change-Id: I177f419d2675ebda5c231a257bed8baf56e13291
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38029
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/northbridge/intel/sandybridge/raminit_mrc.c b/src/northbridge/intel/sandybridge/raminit_mrc.c
index cab5588..aa166c9 100644
--- a/src/northbridge/intel/sandybridge/raminit_mrc.c
+++ b/src/northbridge/intel/sandybridge/raminit_mrc.c
@@ -154,7 +154,7 @@
 	addr_decode_ch[1] = MCHBAR32(MAD_DIMM_CH1);
 
 	printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n",
-	       (MCHBAR32(0x5e04) * 13333 * 2 + 50)/100);
+	       (MCHBAR32(MC_BIOS_DATA) * 13333 * 2 + 50)/100);
 	printk(BIOS_DEBUG, "memcfg channel assignment: A: %d, B % d, C % d\n",
 	       addr_decoder_common & 3,
 	       (addr_decoder_common >> 2) & 3,