MAINTAINERS: add Mediatek MTMIPS Clock maintainer

Adding myself as maintainer for Mediatek MTMIPS clock driver.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MAINTAINERS

@@ -13222,6 +13222,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/i2c/mediatek,mt7621-i2c.yaml
 F:	drivers/i2c/busses/i2c-mt7621.c
 
+MEDIATEK MTMIPS CLOCK DRIVER
+M:	Sergio Paracuellos <sergio.paracuellos@gmail.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/clock/mediatek,mtmips-sysc.yaml
+F:	drivers/clk/ralink/clk-mtmips.c
+
 MEDIATEK NAND CONTROLLER DRIVER
 L:	linux-mtd@lists.infradead.org
 S:	Orphan