sc760x: fixed build err

sc760x_charger_mmi:
fixed build error

Change-Id: I78d66d43a75780612ed9a338f3c70c669bcd364b
Signed-off-by: xuwt2 <xuwt2@lenovo.com>
Reviewed-on: https://gerrit.mot.com/2526086
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Guobin Zhang <zhanggb@motorola.com>
Submit-Approved: Jira Key

drivers/power/sc760x_charger_mmi/sc760x_charger_mmi.c

@@ -1674,7 +1674,7 @@ static void sc760x_charger_set_constraint(void *data,
 static void sc760x_paired_battery_notify(void *data,
 			struct mmi_battery_info *batt_info)
 {
-	int ret = 0, partner_fg_vbatt = 0, fg_vbatt = 0;
+	int partner_fg_vbatt = 0, fg_vbatt = 0;
 	struct sc760x_mmi_charger *chg = data;
 
 	if (!chg) {