[ARM] omap: provide a standard clk_get_parent() implementation

struct clk *clk_get_parent(struct clk *clk)

{

	unsigned long flags;

	struct clk * ret = NULL;

	if (clk == NULL || IS_ERR(clk))

		return ret;

	spin_lock_irqsave(&clockfw_lock, flags);

	if (arch_clock->clk_get_parent)

		ret = arch_clock->clk_get_parent(clk);

	spin_unlock_irqrestore(&clockfw_lock, flags);

	return ret;

	return clk->parent;

}

EXPORT_SYMBOL(clk_get_parent);

	long		(*clk_round_rate)(struct clk *clk, unsigned long rate);

	int		(*clk_set_rate)(struct clk *clk, unsigned long rate);

	int		(*clk_set_parent)(struct clk *clk, struct clk *parent);

	struct clk *	(*clk_get_parent)(struct clk *clk);

	void		(*clk_allow_idle)(struct clk *clk);

	void		(*clk_deny_idle)(struct clk *clk);

	void		(*clk_disable_unused)(struct clk *clk);