clk: clk-mux: Improve a size determination in clk_hw_register_mux_table()

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/clk-mux.c

@@ -134,7 +134,7 @@ struct clk_hw *clk_hw_register_mux_table(struct device *dev, const char *name,
 	}
 
 	/* allocate the mux */
-	mux = kzalloc(sizeof(struct clk_mux), GFP_KERNEL);
+	mux = kzalloc(sizeof(*mux), GFP_KERNEL);
 	if (!mux)
 		return ERR_PTR(-ENOMEM);