ARM: pxa: 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>

arch/arm/mach-pxa/eseries.c

@@ -128,7 +128,7 @@ struct resource eseries_tmio_resources[] = {
 /* Some e-series hardware cannot control the 32K clock */
 static void __init __maybe_unused eseries_register_clks(void)
 {
-	clk_register_fixed_rate(NULL, "CLK_CK32K", NULL, CLK_IS_ROOT, 32768);
+	clk_register_fixed_rate(NULL, "CLK_CK32K", NULL, 0, 32768);
 }
 
 #ifdef CONFIG_MACH_E330