Don't export iio_device_get_sample_size_mask()
Don't export iio_device_get_sample_size_mask()

This function is not used by IIOD anymore, so make it a private symbol.

Signed-off-by: Paul Cercueil <a027184a55211cd23e3f3094f1fdc728df5e0500@crapouillou.net>

analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio