sc520: Fix minor DRAM Controller Setup bug

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
diff --git a/arch/i386/cpu/sc520/sc520_asm.S b/arch/i386/cpu/sc520/sc520_asm.S
index abb03bf..fff56c0 100644
--- a/arch/i386/cpu/sc520/sc520_asm.S
+++ b/arch/i386/cpu/sc520/sc520_asm.S
@@ -500,7 +500,7 @@
 	/* just have your hardware desinger _GIVE_ you what you need here! */
 	movl    $DRCTMCTL, %edi
 	movb    $CONFIG_SYS_SDRAM_DRCTMCTL,%al
-	movb    (%edi), %al
+	movb    %al, (%edi)
 #else
 #if defined(CONFIG_SYS_SDRAM_CAS_LATENCY_2T) || defined(CONFIG_SYS_SDRAM_CAS_LATENCY_3T)
 	/* set the CAS latency now since it is hard to do