MAINTAINERS: Add Lee Jones as the MFD co-maintainer

Lee Jones from Linaro offered to help me with maitaining the MFD drivers.
Also, fix the MFD tree URLs.
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

MAINTAINERS

@@ -5432,7 +5432,9 @@ F:	include/media/mt9v032.h
 
 MULTIFUNCTION DEVICES (MFD)
 M:	Samuel Ortiz <sameo@linux.intel.com>
-T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6.git
+M:	Lee Jones <lee.jones@linaro.org>
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-next.git
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-fixes.git
 S:	Supported
 F:	drivers/mfd/