MAINTAINERS: TURBOchannel: Update entry

Add mailing list and patchwork URL so patches now have a defined path.
Also add myself as a TURBOchannel maintainer.  However Maciej is going
to the the resident TURBOchannel guru.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: "Maciej W. Rozycki" <macro@linux-mips.org>

MAINTAINERS

@@ -9107,6 +9107,9 @@ F:	arch/um/os-Linux/drivers/
 
 TURBOCHANNEL SUBSYSTEM
 M:	"Maciej W. Rozycki" <macro@linux-mips.org>
+M:	Ralf Baechle <ralf@linux-mips.org>
+L:	linux-mips@linux-mips.org
+Q:	http://patchwork.linux-mips.org/project/linux-mips/list/
 S:	Maintained
 F:	drivers/tc/
 F:	include/linux/tc.h