power: supply: cpcap-charger: Fix enable for 3.8V charge setting

Zero is a valid register value for for 3.8V charging.

Fixes: 0c9888e3 ("power: supply: cpcap-charger: Add minimal
CPCAP PMIC battery charger")
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

drivers/power/supply/cpcap-charger.c

@@ -262,7 +262,7 @@ static int cpcap_charger_set_state(struct cpcap_charger_ddata *ddata,
 	bool enable;
 	int error;
 
-	enable = max_voltage && (charge_current || trickle_current);
+	enable = (charge_current || trickle_current);
 	dev_dbg(ddata->dev, "%s enable: %i\n", __func__, enable);
 
 	if (!enable) {