fix for IMB_range

Detail:
  ARM600.s
Admin:
  (highlight level of testing that has taken place)
  (bugfix number if appropriate)

s/ARM600

@@ -3478,7 +3478,7 @@ SyncCodeAreasRange
         MOV     r0, r1
         ADD     r1, r2, #4                 ;exclusive end address
         MOV     r2, #0
-        LDR     lr, [r2, #DCache_LineLen]
+        LDRB    lr, [r2, #DCache_LineLen]
         SUB     lr, lr, #1
         ADD     r1, r1, lr                 ;rounding up end address
         MVN     lr, lr