nb/intel/sandybridge: Use new fixed BAR accessors

One instance in northbridge.c breaks reproduciblity when changed.

Tested with BUILD_TIMELESS=1, Asus P8Z77-V LX2 remains identical.

Change-Id: I2148183827bcacc9e6edb91b26ad35eb2dae5090
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51866
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/sandybridge/raminit_mrc.c b/src/northbridge/intel/sandybridge/raminit_mrc.c
index 149860d..21de0b2 100644
--- a/src/northbridge/intel/sandybridge/raminit_mrc.c
+++ b/src/northbridge/intel/sandybridge/raminit_mrc.c
@@ -175,7 +175,7 @@
 		usbdebug_hw_init(true);
 
 	/* Print the MRC version after executing the UEFI PEI stage */
-	u32 version = MCHBAR32(MRC_REVISION);
+	u32 version = mchbar_read32(MRC_REVISION);
 	printk(BIOS_DEBUG, "MRC Version %d.%d.%d Build %d\n",
 		(version >> 24) & 0xff, (version >> 16) & 0xff,
 		(version >>  8) & 0xff, (version >>  0) & 0xff);