clk: versatile: pass a parent to the ICST clock

As we want to actually define the parent frequency in the device
tree for the ICST clocks, modify the clock registration function
to take a parent argument.

Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/clk/versatile/clk-icst.c

@@ -120,6 +120,7 @@ static const struct clk_ops icst_ops = {
 struct clk *icst_clk_register(struct device *dev,
 			const struct clk_icst_desc *desc,
 			const char *name,
+			const char *parent_name,
 			void __iomem *base)
 {
 	struct clk *clk;