m68k: Add an entry for the NeXTcube machine to the MAINTAINERS file

I don't have much clue about the NeXT hardware, but at least I know now
the source files a little bit, so I volunteer to pick up patches and send
PULL requests for them until someone else with more knowledge steps up
to do this job instead.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190831074519.32613-7-huth@tuxfamily.org>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 65d8a7c..50eaf00 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -910,6 +910,13 @@
 F: hw/net/mcf_fec.c
 F: include/hw/m68k/mcf*.h
 
+NeXTcube
+M: Thomas Huth <huth@tuxfamily.org>
+S: Odd Fixes
+F: hw/m68k/next-*.c
+F: hw/display/next-fb.c
+F: include/hw/m68k/next-cube.h
+
 MicroBlaze Machines
 -------------------
 petalogix_s3adsp1800