drivers/rtc/rtc-bq32k.c: fix register value

Fix register value in bq32000 trickle charging.

Mike reported that I'm using wrong value in one trickle-charging case,
and after checking docs, I must admit he's right.
Signed-off-by: NPavel Machek <pavel@denx.de>
Reported-by: NMike Bremford <mike@bfo.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-bq32k.c

@@ -160,7 +160,7 @@ static int trickle_charger_of_init(struct device *dev, struct device_node *node)
 			dev_err(dev, "bq32k: diode and resistor mismatch\n");
 			return -EINVAL;
 		}
-		reg = 0x25;
+		reg = 0x45;
 		break;
 
 	default: