MAINTAINERS: update L: misuses

L: lines are for the email addresses of traditional mailing lists.
W: lines are for URLs.

Convert two L: misuses to W: links.

Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>