rtc: ds1307: Remove CLK_IS_ROOT

This flag is a no-op now (see commit 47b0eeb3dc8a "clk: Deprecate
CLK_IS_ROOT", 2016-02-02) so remove it.

Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Michael Tatarinov <kukabu@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

drivers/rtc/rtc-ds1307.c

@@ -1151,12 +1151,10 @@ static struct clk_init_data ds3231_clks_init[] = {
 	[DS3231_CLK_SQW] = {
 		.name = "ds3231_clk_sqw",
 		.ops = &ds3231_clk_sqw_ops,
-		.flags = CLK_IS_ROOT,
 	},
 	[DS3231_CLK_32KHZ] = {
 		.name = "ds3231_clk_32khz",
 		.ops = &ds3231_clk_32khz_ops,
-		.flags = CLK_IS_ROOT,
 	},
 };