MAINTAINERS: Update Tegra Git URL

swarren/linux-tegra.git is a stale location; it has moved to
tegra/linux.git.

While the git protocol re-directs to the new location, HTTP does not.
Besides, MAINTAINERS should contain the canonical URL.
Signed-off-by: NAndreas Färber <afaerber@suse.de>
[swarren, updated commit message]
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

MAINTAINERS

@@ -8906,7 +8906,7 @@ M:	Stephen Warren <swarren@wwwdotorg.org>
 M:	Thierry Reding <thierry.reding@gmail.com>
 L:	linux-tegra@vger.kernel.org
 Q:	http://patchwork.ozlabs.org/project/linux-tegra/list/
-T:	git git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra.git
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux.git
 S:	Supported
 N:	[^a-z]tegra