MAINTAINERS: switch maintainer of the hso driver

Since Denis is no longer working for Option, I will maintain the driver from
now on.

Signed-off-by: Jan Dumon <j.dumon@option.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -2592,8 +2592,8 @@ S:	Maintained
 F:	fs/hpfs/
 
 HSO 3G MODEM DRIVER
-P:	Denis Joseph Barrow
-M:	d.barow@option.com
+P:	Jan Dumon
+M:	j.dumon@option.com
 W:	http://www.pharscape.org
 S:	Maintained
 F:	drivers/net/usb/hso.c