[coreboot] workaround for mahogany_fam10. Not a signed-off-by

[Bao, Zheng]

This is for the mahogany_fam10 I just sent. It is not a signed-off-by
patch. We need to work it out about this problem.

Index: src/northbridge/amd/amdht/h3finit.c
===================================================================
--- src/northbridge/amd/amdht/h3finit.c	(revision 4521)
+++ src/northbridge/amd/amdht/h3finit.c	(working copy)
@@ -1104,6 +1104,7 @@
    			AmdPCIRead(currentPtr, &temp);
    		} while (!IS_HT_SLAVE_CAPABILITY(temp));

+#if (CONFIG_HT_CHAIN_UNITID_BASE != 0)
    		AmdPCIReadBits(currentPtr, 25, 21, &unitIDcnt);
    		if ((unitIDcnt + currentBUID > 31) || ((secBus
== 0) && (unitIDcnt + currentBUID > 24)))
    		{
@@ -1145,7 +1146,7 @@
    			STOP_HERE;
    			break;
    		}
-
+#endif
    		AmdPCIReadBits(currentPtr, 26, 26, &temp);
    		pDat->PortList[pDat->TotalLinks*2+1].Link =
(u8)temp;
    		pDat->PortList[pDat->TotalLinks*2+1].Pointer =
currentPtr;
@@ -1156,6 +1157,11 @@
    		depth++;
    		pDat->TotalLinks++;
    		currentBUID += unitIDcnt;
+#if CONFIG_HT_CHAIN_UNITID_BASE == 0
+			STOP_HERE;
+			break;
+#endif
+
    	}
    	if (pDat->HtBlock->AMD_CB_EventNotify)
    	{