MAINTAINERS: add the new dmaengine mailing list

We have a new mailing list hosted by vger for dmaengine

Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 8a0cbf3..707533e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2718,6 +2718,8 @@
 DMA GENERIC OFFLOAD ENGINE SUBSYSTEM
 M:	Vinod Koul <vinod.koul@intel.com>
 M:	Dan Williams <dan.j.williams@intel.com>
+L:	dmaengine@vger.kernel.org
+Q:	https://patchwork.kernel.org/project/linux-dmaengine/list/
 S:	Supported
 F:	drivers/dma/
 F:	include/linux/dma*