clk: mxs: Remove CLK_IS_ROOT

This flag is a no-op now. Remove usage of the flag.
Acked-by: NShawn Guo <shawnguo@kernel.org>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>

drivers/clk/mxs/clk.h

@@ -38,7 +38,7 @@ struct clk *mxs_clk_frac(const char *name, const char *parent_name,
 
 static inline struct clk *mxs_clk_fixed(const char *name, int rate)
 {
-	return clk_register_fixed_rate(NULL, name, NULL, CLK_IS_ROOT, rate);
+	return clk_register_fixed_rate(NULL, name, NULL, 0, rate);
 }
 
 static inline struct clk *mxs_clk_gate(const char *name,