dt-bindings: clock: mvebu: Add compatible string for 98dx1135 core clock

Add compatible string for the core clock on the 98dx1135 switch with
integrated CPU.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/mvebu-core-clock.txt

@@ -59,6 +59,7 @@ Required properties:
 	"marvell,dove-core-clock" - for Dove SoC core clocks
 	"marvell,kirkwood-core-clock" - for Kirkwood SoC (except mv88f6180)
 	"marvell,mv88f6180-core-clock" - for Kirkwood MV88f6180 SoC
+	"marvell,mv98dx1135-core-clock" - for Kirkwood 98dx1135 SoC
 	"marvell,mv88f5181-core-clock" - for Orion MV88F5181 SoC
 	"marvell,mv88f5182-core-clock" - for Orion MV88F5182 SoC
 	"marvell,mv88f5281-core-clock" - for Orion MV88F5281 SoC