tty: MAINTAINERS: add drivers/serial/jsm/ as maintained driver

Soott Kilau is handing off the maintainership of the jsm serial
driver to me, and this patch just add the driver as maintained.

Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/MAINTAINERS b/MAINTAINERS
index f2a2b8e..e2e24b5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3331,6 +3331,12 @@
 F:	include/linux/ext*jbd*.h
 F:	include/linux/jbd*.h
 
+JSM Neo PCI based serial card
+M:	Breno Leitao <leitao@linux.vnet.ibm.com>
+L:	linux-serial@vger.kernel.org
+S:	Maintained
+F:	drivers/serial/jsm/
+
 K8TEMP HARDWARE MONITORING DRIVER
 M:	Rudolf Marek <r.marek@assembler.cz>
 L:	lm-sensors@lm-sensors.org