clk: fixed-rate: Remove CLK_IS_ROOT

This flag is a no-op now. Remove usage of the flag.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/clk-fixed-rate.c

@@ -136,8 +136,7 @@ void of_fixed_clk_setup(struct device_node *node)
 	of_property_read_string(node, "clock-output-names", &clk_name);
 
 	clk = clk_register_fixed_rate_with_accuracy(NULL, clk_name, NULL,
-						    CLK_IS_ROOT, rate,
-						    accuracy);
+						    0, rate, accuracy);
 	if (!IS_ERR(clk))
 		of_clk_add_provider(node, of_clk_src_simple_get, clk);
 }