target-arm: Add VTTBR_EL2

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1442135278-25281-4-git-send-email-edgar.iglesias@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index f91b793..96b8f2a 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -222,6 +222,7 @@
             };
             uint64_t ttbr1_el[4];
         };
+        uint64_t vttbr_el2; /* Virtualization Translation Table Base.  */
         /* MMU translation table base control. */
         TCR tcr_el[4];
         TCR vtcr_el2; /* Virtualization Translation Control.  */