msm: pcie: fix PCIe packet corruption issue on APQ8064

The PCIe packet corruption observed on APQ8064v1 was found on v2
as well. Thus, apply this software workaround to v2 as well.

Change-Id: I7fc1c614c1e8ca4b273cb03d8079ec2d60b043b4
Signed-off-by: Yan He <yanhe@codeaurora.org>