[MIPS] vr41xx: need one more nop with mtc0_tlbw_hazard()

NEC VR4111 and VR4121 need one more nop with mtc0_tlbw_hazard().
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

include/asm-mips/hazards.h

@@ -157,7 +157,7 @@ ASMMACRO(back_to_back_c0_hazard,
  * processors.
  */
 ASMMACRO(mtc0_tlbw_hazard,
-	nop
+	nop; nop
 	)
 ASMMACRO(tlbw_use_hazard,
 	nop; nop; nop