MAINTAINERS: mark ath6kl as orphan

I don't have time to maintain ath6kl anymore so mark it as orphan.

Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220128135841.1926-1-kvalo@kernel.org

MAINTAINERS

@@ -3133,11 +3133,9 @@ W:	https://wireless.wiki.kernel.org/en/users/Drivers/ath5k
 F:	drivers/net/wireless/ath/ath5k/
 
 ATHEROS ATH6KL WIRELESS DRIVER
-M:	Kalle Valo <kvalo@kernel.org>
 L:	linux-wireless@vger.kernel.org
-S:	Supported
+S:	Orphan
 W:	https://wireless.wiki.kernel.org/en/users/Drivers/ath6kl
-T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
 F:	drivers/net/wireless/ath/ath6kl/
 
 ATI_REMOTE2 DRIVER