iio: frequency: adrf6780: rm clk provider include

The driver has no clock provider implementation, therefore remove the
include.

Fixes: 63aaf6d0 ("iio: frequency: adrf6780: add support for ADRF6780")
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://lore.kernel.org/r/20240530092835.36892-1-antoniu.miclaus@analog.com


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