ath9k: Fix LED gpio for AR93xx chipsets. (from ToT to R12 factory)

The LED gpio is incorrectly programmed for AR9300 and so the led
is not working propelry. AR93xx uses gpio 10 for LED and not the
default.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>

BUG=chromium-os-partner:3440
TEST=manual:check device operation
Cherry-Picked From: http://codereview.chromium.org/6900058

Change-Id: I64e27e35f78dbff532b8ff40544359a327bb6bf2
Reviewed-on: http://gerrit.chromium.org/gerrit/998
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
2 files changed