clk: pwm: Remove CLK_IS_ROOT

This flag is a no-op now. Remove usage of the flag.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/clk/clk-pwm.c b/drivers/clk/clk-pwm.c
index 328fcfc..8830458 100644
--- a/drivers/clk/clk-pwm.c
+++ b/drivers/clk/clk-pwm.c
@@ -95,7 +95,7 @@
 
 	init.name = clk_name;
 	init.ops = &clk_pwm_ops;
-	init.flags = CLK_IS_BASIC | CLK_IS_ROOT;
+	init.flags = CLK_IS_BASIC;
 	init.num_parents = 0;
 
 	clk_pwm->pwm = pwm;