device property: Fix recent breakage of fwnode_get_next_parent_dev()

Due to a subtle typo, instead of commit 87ffea09 ("device
property: Introduce fwnode_for_each_parent_node()") being a no-op
change, it ended up causing the display on my sc7180-trogdor-lazor
device from coming up unless I added "fw_devlink=off" to my kernel
command line. Fix the typo.

Fixes: 87ffea09 ("device property: Introduce fwnode_for_each_parent_node()")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Saravana Kannan <saravanak@google.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>