clk: clk-mux: Use struct udevice instead of struct device

Use U-Boot specific struct udevice instead of Linux compatibility
struct device in clk-mux registration.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c
index 9507a77..e2331a0 100644
--- a/drivers/clk/clk-mux.c
+++ b/drivers/clk/clk-mux.c
@@ -159,7 +159,7 @@
 	.set_parent = clk_mux_set_parent,
 };
 
-struct clk *clk_register_mux(struct device *dev, const char *name,
+struct clk *clk_register_mux(struct udevice *dev, const char *name,
 		const char * const *parent_names, u8 num_parents,
 		unsigned long flags,
 		void __iomem *reg, u8 shift, u8 width,