clk: at91: Remove CLK_IS_ROOT

This flag is a no-op now. Remove usage of the flag.
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/at91/clk-main.c

@@ -315,7 +315,7 @@ at91_clk_register_main_rc_osc(struct at91_pmc *pmc,
 	init.ops = &main_rc_osc_ops;
 	init.parent_names = NULL;
 	init.num_parents = 0;
-	init.flags = CLK_IS_ROOT | CLK_IGNORE_UNUSED;
+	init.flags = CLK_IGNORE_UNUSED;
 
 	osc->hw.init = &init;
 	osc->pmc = pmc;

drivers/clk/at91/clk-slow.c

@@ -251,7 +251,7 @@ at91_clk_register_slow_rc_osc(void __iomem *sckcr,
 	init.ops = &slow_rc_osc_ops;
 	init.parent_names = NULL;
 	init.num_parents = 0;
-	init.flags = CLK_IS_ROOT | CLK_IGNORE_UNUSED;
+	init.flags = CLK_IGNORE_UNUSED;
 
 	osc->hw.init = &init;
 	osc->sckcr = sckcr;