MAINTAINERS: update location of media main tree

commit dc51b3c upstream.

There were some recent changes on the way we're handling
media patches. Now, the official tree is located at:

	https://git.linuxtv.org/media.git/

Update it at MAINTAINERS file.

Cc: [email protected]
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Reviewed-by: Hans Verkuil <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: mchehab