MAINTAINERS: add to ioatdma maintainer list

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
[djbw: add dmaengine list]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

MAINTAINERS

@@ -4353,7 +4353,10 @@ F:	arch/x86/kernel/microcode_intel.c
 
 INTEL I/OAT DMA DRIVER
 M:	Dan Williams <dan.j.williams@intel.com>
-S:	Maintained
+M:	Dave Jiang <dave.jiang@intel.com>
+L:	dmaengine@vger.kernel.org
+Q:	https://patchwork.kernel.org/project/linux-dmaengine/list/
+S:	Supported
 F:	drivers/dma/ioat*
 
 INTEL IOMMU (VT-d)