Bluetooth: fix for the unrecoverable state after BT on is failed

- When bt_enable() is called ,device try to turn on hci device.
  if timeout happened after 10 seconds try,set_bluetooth_power() is called.
  but hciattach is still running state, so turning on BT will fail.
  it is unrecoverable before device reboot.

- add code for hciattach stop

Signed-off-by: jhtop.kim <jhtop.kim@samsung.com>

Change-Id: Id210995eb4e811994d40e1a5f567606f2b9a0207
1 file changed