MAINTAINERS: add Cadence USBSSP DRD IP driver entry

Patch adds entry for USBSSP (CDNSP) driver into MAINTARNERS file.
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

MAINTAINERS

@@ -3890,6 +3890,15 @@ S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb.git
 F:	Documentation/devicetree/bindings/usb/cdns,usb3.yaml
 F:	drivers/usb/cdns3/
+X:	drivers/usb/cdns3/cdnsp*
+
+CADENCE USBSSP DRD IP DRIVER
+M:	Pawel Laszczak <pawell@cadence.com>
+L:	linux-usb@vger.kernel.org
+S:	Maintained
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb.git
+F:	drivers/usb/cdns3/
+X:	drivers/usb/cdns3/cdns3*
 
 CADET FM/AM RADIO RECEIVER DRIVER
 M:	Hans Verkuil <hverkuil@xs4all.nl>