carl9170 firmware: Wake-on-LAN support

carl9170 firmware: Wake-on-LAN support

With this feature enabled, the device will stay
active while the host goes into System Standby
[Suspend to RAM!].

Furthermore, it scans all incoming 802.11 data frames
for a MAGIC WOL pattern and - when found - propagates
the wake-up call to the USB Host.

Notes/Limitations:
	* Your host has to support USB remote wake-up.
	  [In some cases, /proc/acpi/wakeup has to be
	   configured as well - see Google for more
	   details]

	* The MAC address is taken from the device EEPROM.
	  [so, ifconfig dev hw ether overrides don't
	   work (yet)]

	* The magic pattern has to be within the first
	  320 bytes of the data frame.

	* The magic frames has to be send unencrypted.
	  Therefore the WOL initiator has to support
	  frame injection [not a problem for most
	  mac80211-based drivers].

	* The initatior need to be in range and on the
	  same channel as well.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>