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>
diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
index b85f435..b9bdfd8 100644
--- a/drivers/clk/at91/clk-main.c
+++ b/drivers/clk/at91/clk-main.c
@@ -315,7 +315,7 @@
 	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;
diff --git a/drivers/clk/at91/clk-slow.c b/drivers/clk/at91/clk-slow.c
index 67b3047..402b45d 100644
--- a/drivers/clk/at91/clk-slow.c
+++ b/drivers/clk/at91/clk-slow.c
@@ -251,7 +251,7 @@
 	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;