pps: clients: gpio: Use dev_err_probe() to avoid log noise

pps: clients: gpio: Use dev_err_probe() to avoid log noise

When GPIO APIs return -EPROBE_DEFER there is no need to print the message,
especially taking into consideration that it may repeat several times.
Use dev_err_probe() to avoid log noise in such cases.

Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210318130321.24227-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>