GitLab

When resetting device on a hang the pending transactions in the
VBIF should be cleared since the GPU is hung and unable to accept
any transactions. These pending transactions can cause VBIF pipe
to block the IOMMU so clear them.
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>
Change-Id: I6e0171a6e61c0dd831ce7afdc177775b2ae3f07f