pwm: stmpe: Fix wrong register offset for hwpwm=2 case

Fix trivial copy/paste bug.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Fixes: ef1f09ec ("pwm: Add a driver for the STMPE PWM")
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-stmpe.c

@@ -145,7 +145,7 @@ static int stmpe_24xx_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 		break;
 
 	case 2:
-		offset = STMPE24XX_PWMIC1;
+		offset = STMPE24XX_PWMIC2;
 		break;
 
 	default: