[MIPS] SMTC: Fix cp0 hazard.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index 802febe..a8b3871 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -261,6 +261,7 @@
 		    }
 		}
 		write_c0_mvpcontrol(read_c0_mvpcontrol() | MVPCONTROL_STLB);
+		ehb();
 
 		/*
 		 * Setup kernel data structures to use software total,