staging: ath6kl: Fixing a race condition during initialization

The commit fixes a race condition in the initialization portion of the
driver. The problem was observed while testing with the kernel in the
staging-next tree. The wait on the ready event is signalled prematurely
before setting the arVersion.wlan_ver and arVersion.abi_ver. The code
waiting on this semaphore checks for the validity of these values and
hence may proceed with an un-updated values of these fields. The wakeup
signal is now sent after these values are set.

Signed-off-by: Vipin Mehta <vmehta@atheros.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>