staging: ath6kl Remove CONFIG_HAS_WAKELOCK

The patch below removes CONFIG_HAS_WAKELOCK since it is no longer in the kernel.
Please let me know, if this is the proper way of doing this and/or more needs
to be done..

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>