MAINTAINERS: add myself as maintainer of Cadence I3C master controller driver

As discussed with Boris Brezillon - I'm adding myself as the maintainer.
Signed-off-by: Przemyslaw Gaj <pgaj@cadence.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>

MAINTAINERS

@@ -7746,6 +7746,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/i3c/snps,dw-i3c-master.txt
 F:	drivers/i3c/master/dw*
 
+I3C DRIVER FOR CADENCE I3C MASTER IP
+M:      Przemysław Gaj <pgaj@cadence.com>
+S:      Maintained
+F:      Documentation/devicetree/bindings/i3c/cdns,i3c-master.txt
+F:      drivers/i3c/master/i3c-master-cdns.c
+
 IA64 (Itanium) PLATFORM
 M:	Tony Luck <tony.luck@intel.com>
 M:	Fenghua Yu <fenghua.yu@intel.com>