Add Atheros AR1111 support to the HAL.

This seems to probe/attach as an AR9485 and thus nothing else besides
adding the device id seems to be required.

ath0: <Atheros AR1111> mem 0xf4800000-0xf487ffff irq 19 at device 0.0 on pci5
ath0: [HT] enabling HT modes
ath0: [HT] enabling short-GI in 20MHz mode
ath0: [HT] 1 stream STBC receive enabled
ath0: [HT] 1 RX streams; 1 TX streams
ath0: AR9485 mac 576.1 RF5110 phy 1926.8
ath0: 2GHz radio: 0x0000; 5GHz radio: 0x0000

The NIC I have here is a 1 antenna, 2GHz only device.

Thankyou to Jim Thompson <jim@netgate.com> for the AR1111 NIC.

Tested:

* AR1111 (pretending not to be an AR9485, but failing miserably);
  STA mode with powersave.

Relnotes:	yes
Sponsored by:	Netgate
Quieten the RX/TX descriptor and FIFO setup debugging.

Tested:

* AR9485, STA mode
Break out the multicast programming into its own hardware specific
call, which assumes the hardware is awake.

Turn ath_update_mcast() into a routine that's only called from the
net80211 layer - and it forces the hardware awake first.

This fixes a LOR from the EDMA RX path which calls ath_mode_init()
with the RX lock held - the driver lock can't also be grabbed.
This path assumes that the ath_mode_init() callers all wake up
the NIC first.

Tested:

* AR9485, STA mode, powersave