cnss2: Use token argument instead of dev in SMMU fault handler

The dev argument from SMMU fault handler is SMMU device not client
device so use token argument to get PCI context for driver.

Change-Id: Ia126bf144b0bda537438d5a212b2e2ef8a21d022
Signed-off-by: Yue Ma <yuem@codeaurora.org>