MAINTAINERS: Remove JZ4780 DMA driver entry

The entry for MIPS Ingenic JZ4780 DMA driver is not up to date anymore.
Zubair Lutfullah Kakakhel's email bounces and no maintenance is
provided.

Suggested-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MAINTAINERS

@@ -8673,11 +8673,6 @@ F:	include/uapi/rdma/
 F:	samples/bpf/ibumad_kern.c
 F:	samples/bpf/ibumad_user.c
 
-INGENIC JZ4780 DMA Driver
-M:	Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
-S:	Maintained
-F:	drivers/dma/dma-jz4780.c
-
 INGENIC JZ4780 NAND DRIVER
 M:	Harvey Hunt <harveyhuntnexus@gmail.com>
 L:	linux-mtd@lists.infradead.org