Staging: the tree is now kept in git, not quilt

Update the MAINTAINERS file to show the new location of the staging
development tree.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

MAINTAINERS

@@ -5537,7 +5537,7 @@ S:	Maintained
 
 STAGING SUBSYSTEM
 M:	Greg Kroah-Hartman <gregkh@suse.de>
-T:	quilt kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-next-2.6.git
 L:	devel@driverdev.osuosl.org
 S:	Maintained
 F:	drivers/staging/