MAINTAINERS: update git urls for 2.6 deletions

Update the various git urls for name changes from 2.6.

Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>