MAINTAINERS: add self for the dz serial driver

Now that I have got the necessary piece of hardware (thanks, Thiemo!), I may
well offer myself as the maintainer for the dz serial driver.  I hope nobody
objects.
Signed-off-by: NMaciej W. Rozycki <macro@linux-mips.org>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -1371,6 +1371,11 @@ W:	http://linuxtv.org/
 T:	git kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb.git
 S:	Maintained
 
+DZ DECSTATION DZ11 SERIAL DRIVER
+P:	Maciej W. Rozycki
+M:	macro@linux-mips.org
+S:	Maintained
+
 EATA-DMA SCSI DRIVER
 P:	Michael Neuffer
 L:	linux-eata@i-connect.net, linux-scsi@vger.kernel.org