lp8727_charger: Clean up lp8727_charger_changed()

Declare a variable at one line. Just return when no charger exists to make
code simpler.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>

drivers/power/lp8727_charger.c

@@ -393,16 +393,20 @@ static int lp8727_battery_get_property(struct power_supply *psy,
 static void lp8727_charger_changed(struct power_supply *psy)
 {
 	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
+	u8 eoc_level;
+	u8 ichg;
 	u8 val;
-	u8 eoc_level, ichg;
-
-	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
-		if (pchg->chg_parm) {
-			eoc_level = pchg->chg_parm->eoc_level;
-			ichg = pchg->chg_parm->ichg;
-			val = (ichg << LP8727_ICHG_SHIFT) | eoc_level;
-			lp8727_write_byte(pchg, LP8727_CHGCTRL2, val);
-		}
+
+	/* skip if no charger exists */
+	if (!lp8727_is_charger_attached(psy->name, pchg->devid))
+		return;
+
+	/* update charging parameters */
+	if (pchg->chg_parm) {
+		eoc_level = pchg->chg_parm->eoc_level;
+		ichg = pchg->chg_parm->ichg;
+		val = (ichg << LP8727_ICHG_SHIFT) | eoc_level;
+		lp8727_write_byte(pchg, LP8727_CHGCTRL2, val);
 	}
 }