bt: Use device name as BT device name.

 * QCOM_BTD is an ugly string and the device name
   makes much more sense.

 * This way we can also avoid redefining a lot of
   BDROID_BUILDCFG stuff in device trees.

Change-Id: I9f402b46107312c0720b5a43f1a56ba73543dce4
1 file changed