MAINTAINERS: Add linux-mips mailing list to JZ47xx entries

The entries for JZ47xx SoCs and its drivers lacked MIPS mailing list.
Only MTD NAND driver pointed linux-mtd.  Add linux-mips so the relevant
patches will get attention of MIPS developers.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MAINTAINERS

@@ -8676,11 +8676,13 @@ F:	samples/bpf/ibumad_user.c
 INGENIC JZ4780 NAND DRIVER
 M:	Harvey Hunt <harveyhuntnexus@gmail.com>
 L:	linux-mtd@lists.infradead.org
+L:	linux-mips@vger.kernel.org
 S:	Maintained
 F:	drivers/mtd/nand/raw/ingenic/
 
 INGENIC JZ47xx SoCs
 M:	Paul Cercueil <paul@crapouillou.net>
+L:	linux-mips@vger.kernel.org
 S:	Maintained
 F:	arch/mips/boot/dts/ingenic/
 F:	arch/mips/generic/board-ingenic.c