clk: use uninitialized_var instead setting 'flags' to 0 directly.

Setting 'flags' to zero will be certainly a misleading way to avoid
warning of 'flags' may be used uninitialized. uninitialized_var is
a correct way because the warning is a false possitive.
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

drivers/clk/clk-gate.c

@@ -45,7 +45,7 @@ static void clk_gate_endisable(struct clk_hw *hw, int enable)
 {
 	struct clk_gate *gate = to_clk_gate(hw);
 	int set = gate->flags & CLK_GATE_SET_TO_DISABLE ? 1 : 0;
-	unsigned long flags = 0;
+	unsigned long uninitialized_var(flags);
 	u32 reg;
 
 	set ^= enable;