clk: samsung: Convert to clk_hw based provider APIs

We're removing struct clk from the clk provider API, so switch
this code to using the clk_hw based provider APIs.

Cc: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>

drivers/clk/samsung/clk-cpu.c

@@ -100,8 +100,8 @@ static void wait_until_mux_stable(void __iomem *mux_reg, u32 mux_pos,
 static long exynos_cpuclk_round_rate(struct clk_hw *hw,
 			unsigned long drate, unsigned long *prate)
 {
-	struct clk *parent = __clk_get_parent(hw->clk);
-	*prate = __clk_round_rate(parent, drate);
+	struct clk_hw *parent = clk_hw_get_parent(hw);
+	*prate = clk_hw_round_rate(parent, drate);
 	return *prate;
 }