ARM: Kirkwood: Remove redundent USB clock alias

Now that USB is instantiated via DT, and the USB DT node has a clocks
property, we no longer need a C coded clock alias. Remove it.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

arch/arm/mach-kirkwood/board-dt.c

@@ -55,10 +55,6 @@ static void __init kirkwood_legacy_clk_init(void)
 	orion_clkdev_add("0", "pcie",
 			 of_clk_get_from_provider(&clkspec));
 
-	clkspec.args[0] = CGC_BIT_USB0;
-	orion_clkdev_add(NULL, "orion-ehci.0",
-			 of_clk_get_from_provider(&clkspec));
-
 	clkspec.args[0] = CGC_BIT_PEX1;
 	orion_clkdev_add("1", "pcie",
 			 of_clk_get_from_provider(&clkspec));