MAINTAINERS: add MT7621 PHY PCI maintainer

Adding myself as maintainer for mt7621 pci phy driver.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20201121155037.21354-4-sergio.paracuellos@gmail.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

MAINTAINERS

@@ -11108,6 +11108,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/i2c/i2c-mt7621.txt
 F:	drivers/i2c/busses/i2c-mt7621.c
 
+MEDIATEK MT7621 PHY PCI DRIVER
+M:	Sergio Paracuellos <sergio.paracuellos@gmail.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/phy/mediatek,mt7621-pci-phy.yaml
+F:	drivers/phy/ralink/phy-mt7621-pci.c
+
 MEDIATEK NAND CONTROLLER DRIVER
 L:	linux-mtd@lists.infradead.org
 S:	Orphan