MAINTAINERS: linux-can moved to github

As gitorious will shut down at the end of May 2015, the linux-can website moved
to github. This patch reflects this change.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

MAINTAINERS

@@ -2370,7 +2370,7 @@ F:	arch/x86/include/asm/tce.h
 CAN NETWORK LAYER
 M:	Oliver Hartkopp <socketcan@hartkopp.net>
 L:	linux-can@vger.kernel.org
-W:	http://gitorious.org/linux-can
+W:	https://github.com/linux-can
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can.git
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git
 S:	Maintained
@@ -2386,7 +2386,7 @@ CAN NETWORK DRIVERS
 M:	Wolfgang Grandegger <wg@grandegger.com>
 M:	Marc Kleine-Budde <mkl@pengutronix.de>
 L:	linux-can@vger.kernel.org
-W:	http://gitorious.org/linux-can
+W:	https://github.com/linux-can
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can.git
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git
 S:	Maintained