PM / devfreq: mtk-cci: Fix variable deferencing before NULL check

smatch warning:
drivers/devfreq/mtk-cci-devfreq.c:135 mtk_ccifreq_target()
warn: variable dereferenced before check 'drv' (see line 130)

This is based on static analysis only. Compilation tested.

Signed-off-by: Sukrut Bellary <sukrut.bellary@linux.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

Author: sukrutb

drivers/devfreq/mtk-cci-devfreq.c

@@ -127,7 +127,7 @@ static int mtk_ccifreq_target(struct device *dev, unsigned long *freq,
 			      u32 flags)
 {
 	struct mtk_ccifreq_drv *drv = dev_get_drvdata(dev);
-	struct clk *cci_pll = clk_get_parent(drv->cci_clk);
+	struct clk *cci_pll;
 	struct dev_pm_opp *opp;
 	unsigned long opp_rate;
 	int voltage, pre_voltage, inter_voltage, target_voltage, ret;
@@ -139,6 +139,7 @@ static int mtk_ccifreq_target(struct device *dev, unsigned long *freq,
 		return 0;
 
 	inter_voltage = drv->inter_voltage;
+	cci_pll = clk_get_parent(drv->cci_clk);
 
 	opp_rate = *freq;
 	opp = devfreq_recommended_opp(dev, &opp_rate, 1);