[iwlwifi] Remove use of mmio_buffer_t

Only one BAR is ever mappable in the driver as currently implemented so
instead of using the C mmio_buffer_t interface, just expose a MMIO_PTR
to the C side of the driver.

Bug: 115988
Change-Id: I932bd30c021f6151424d877f8f86837374fff2f0
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/870677
Reviewed-by: Sakthi Vignesh Radhakrishnan <rsakthi@google.com>
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
Fuchsia-Auto-Submit: Christopher Anderson <cja@google.com>
4 files changed
tree: 8ce0f9e8f24022830b50caa781e2aa8d940eac2b
  1. third_party/