Rearrange Atheros firmware.

Make different chipsets have their own subdirectories under the common
Atheros umbrella.

This is a pure move without any file changes. The reciprocal CL
in chromiumos-overlay is http://codereview.chromium.org/2098005/show.

Tested by building the image, mounting it locally as a loop device and examining the /lib/firmware directory contents. All Atheros firmware files (from ath3k and ath6k trees) are present.

Review URL: http://codereview.chromium.org/2130004
44 files changed
tree: 5e8425866f6ff77369a4c31e066ed63feeeb9037
  1. ath3k/
  2. ath6k/