target-arm: Make vbar_write writeback to any CPREG

Reviewed-by: NPeter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1400980132-25949-22-git-send-email-edgar.iglesias@gmail.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

target-arm/helper.c

@@ -681,7 +681,7 @@ static void vbar_write(CPUARMState *env, const ARMCPRegInfo *ri,
      * contexts. (ARMv8 would permit us to do no masking at all, but ARMv7
      * requires the bottom five bits to be RAZ/WI because they're UNK/SBZP.)
      */
-    env->cp15.vbar_el[1] = value & ~0x1FULL;
+    raw_write(env, ri, value & ~0x1FULL);
 }
 
 static uint64_t ccsidr_read(CPUARMState *env, const ARMCPRegInfo *ri)