MAINTAINERS: ioatdma, dmaengine and async_tx maintainers change

Shannon Nelson replaced by Maciej Sosnowski in maintanance of
INTEL I/OAT DMA DRIVER, DMA GENERIC ENGINE SUBSYSTEM
and ASYNCHRONOUS TRANSFERS/TRANSFORMS API.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -640,8 +640,8 @@ S:	Maintained
 ASYNCHRONOUS TRANSFERS/TRANSFORMS API
 P:	Dan Williams
 M:	dan.j.williams@intel.com
-P:	Shannon Nelson
-M:	shannon.nelson@intel.com
+P:	Maciej Sosnowski
+M:	maciej.sosnowski@intel.com
 L:	linux-kernel@vger.kernel.org
 W:	http://sourceforge.net/projects/xscaleiop
 S:	Supported
@@ -1334,8 +1334,8 @@ L:	netdev@vger.kernel.org
 S:	Maintained
 
 DMA GENERIC OFFLOAD ENGINE SUBSYSTEM
-P:	Shannon Nelson
-M:	shannon.nelson@intel.com
+P:	Maciej Sosnowski
+M:	maciej.sosnowski@intel.com
 P:	Dan Williams
 M:	dan.j.williams@intel.com
 L:	linux-kernel@vger.kernel.org
@@ -2013,8 +2013,8 @@ M:	tigran@aivazian.fsnet.co.uk
 S:	Maintained
 
 INTEL I/OAT DMA DRIVER
-P:	Shannon Nelson
-M:	shannon.nelson@intel.com
+P:	Maciej Sosnowski
+M:	maciej.sosnowski@intel.com
 L:	linux-kernel@vger.kernel.org
 S:	Supported