[coreboot] [patch]: AMD DDR3 fix the register name

[Bao, Zheng]

Fix the typo. Field DisAutoRefresh is in DramTimngHi.

Signed-off-by: Zheng Bao

Index: src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
===================================================================
--- src/northbridge/amd/amdmct/mct_ddr3/mct_d.c	(revision 5818)
+++ src/northbridge/amd/amdmct/mct_ddr3/mct_d.c	(working copy)
@@ -1220,7 +1220,7 @@
    Set_NB32(dev, 0x88 + reg_off, DramTimingLo);	/*DCT Timing
Low*/

if (pDCTstat->Speed > 4) {
-		DramTimingLo |= 1 << DisAutoRefresh;
+		DramTimingHi |= 1 << DisAutoRefresh;
    }
    DramTimingHi |= 0x000018FF;
    Set_NB32(dev, 0x8c + reg_off, DramTimingHi);	/*DCT Timing
Hi*/