I am getting a few
|warning: unused variable ‘p’ [-Wunused-variable]
|warning: unused variable ‘prop’ [-Wunused-variable]

in the case where CONFIG_OF is not defined and the parameters are only
used in the loop macro.
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NGrant Likely <grant.likely@linaro.org>