MAINTAINERS: Move dma-buf to drm-misc git

Sumit still takes care about dma-buf, but we've merged the trees
together since way too much overlap. And Gustavo is also part of the
drm-misc team to be able to help out.

Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Acked-by: NSumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161116140819.31165-2-daniel.vetter@ffwll.ch

MAINTAINERS

@@ -3911,7 +3911,7 @@ F:	include/linux/dma-buf*
 F:	include/linux/reservation.h
 F:	include/linux/*fence.h
 F:	Documentation/dma-buf-sharing.txt
-T:	git git://git.linaro.org/people/sumitsemwal/linux-dma-buf.git
+T:	git git://anongit.freedesktop.org/drm/drm-misc
 
 SYNC FILE FRAMEWORK
 M:	Sumit Semwal <sumit.semwal@linaro.org>
@@ -3924,7 +3924,7 @@ F:	drivers/dma-buf/sw_sync.c
 F:	include/linux/sync_file.h
 F:	include/uapi/linux/sync_file.h
 F:	Documentation/sync_file.txt
-T:	git git://git.linaro.org/people/sumitsemwal/linux-dma-buf.git
+T:	git git://anongit.freedesktop.org/drm/drm-misc
 
 DMA GENERIC OFFLOAD ENGINE SUBSYSTEM
 M:	Vinod Koul <vinod.koul@intel.com>