MAINTAINERS: update PPPoE maintainer address

Cc: Michal Ostrowski <mostrows@earthlink.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -3264,7 +3264,7 @@ S:	Maintained
 
 PPP OVER ETHERNET
 P:	Michal Ostrowski
-M:	mostrows@speakeasy.net
+M:	mostrows@earthlink.net
 S:	Maintained
 
 PPP OVER L2TP