ACPI / amba: Remove CLK_IS_ROOT

This flag is a no-op now (see commit 47b0eeb3 "clk: Deprecate
CLK_IS_ROOT", 2016-02-02) so remove it.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Graeme Gregory <graeme.gregory@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/acpi_amba.c

@@ -35,8 +35,7 @@ static void amba_register_dummy_clk(void)
 	if (amba_dummy_clk)
 		return;
 
-	amba_dummy_clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL,
-						CLK_IS_ROOT, 0);
+	amba_dummy_clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 0);
 	clk_register_clkdev(amba_dummy_clk, "apb_pclk", NULL);
 }