MAINTAINERS: update ath6kl git location

The git tree is in github.com nowadays.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

MAINTAINERS

diff --git a/MAINTAINERS b/MAINTAINERS
index 44626b8..7a403ba 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1406,7 +1406,7 @@
 M:	Kalle Valo <kvalo@qca.qualcomm.com>
 L:	linux-wireless@vger.kernel.org
 W:	http://wireless.kernel.org/en/users/Drivers/ath6kl
-T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath6kl.git
+T:	git git://github.com/kvalo/ath.git
 S:	Supported
 F:	drivers/net/wireless/ath/ath6kl/