arm_gicv3_kvm: increase clroffset accordingly

It forgot to increase clroffset during the loop. So it only clear the
first 4 bytes.

Fixes: 367b9f52
Cc: qemu-stable@nongnu.org
Signed-off-by: NShannon Zhao <zhaoshenglong@huawei.com>
Reviewed-by: NEric Auger <eric.auger@redhat.com>
Message-id: 1527047633-12368-1-git-send-email-zhaoshenglong@huawei.com
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 34ffacae)
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

hw/intc/arm_gicv3_kvm.c

@@ -243,6 +243,7 @@ static void kvm_dist_putbmp(GICv3State *s, uint32_t offset,
         if (clroffset != 0) {
             reg = 0;
             kvm_gicd_access(s, clroffset, &reg, true);
+            clroffset += 4;
         }
         reg = *gic_bmp_ptr32(bmp, irq);
         kvm_gicd_access(s, offset, &reg, true);