iio: imu: adis16400: Call '__adis_initial_startup()' in probe

Call '__adis_initial_startup()' instead of its locked variant in
'adis16400_probe()'.
The locks are not needed at this point.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20221122082757.449452-7-ramona.bolboaca@analog.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>