staging: ath6kl: cfg80211: Convert forceFgScan to A_UINT32

It's declared that way in the prototype, use it that way too.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Vipin Mehta <vipin.mehta@atheros.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>