mfd: cros_ec: Small kerneldoc fix

s/cros_ec_register/cros_ec_query_all
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

include/linux/mfd/cros_ec.h

@@ -245,7 +245,7 @@ int cros_ec_remove(struct cros_ec_device *ec_dev);
 int cros_ec_register(struct cros_ec_device *ec_dev);
 
 /**
- * cros_ec_register -  Query the protocol version supported by the ChromeOS EC
+ * cros_ec_query_all -  Query the protocol version supported by the ChromeOS EC
  *
  * @ec_dev: Device to register
  * @return 0 if ok, -ve on error