clk: imx: remove redundant initialization of ret to zero

The initialization of ret is redundant as it is being re-assigned to
the return value from the call to imx8m_clk_composite_compute_dividers.
Clean this up by removing the initialization.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NStephen Boyd <sboyd@kernel.org>

drivers/clk/imx/clk-composite-8m.c

@@ -93,7 +93,7 @@ static int imx8m_clk_composite_divider_set_rate(struct clk_hw *hw,
 	unsigned long flags = 0;
 	int prediv_value;
 	int div_value;
-	int ret = 0;
+	int ret;
 	u32 val;
 
 	ret = imx8m_clk_composite_compute_dividers(rate, parent_rate,