[PATCH 5.10/5.15/6.1 0/1] staging: iio: resolver: ad2s1210: remove call to spi_setup()

This removes the call to spi_setup() in the ad2s1210 driver. Setting MODE_3 was incorrect. It should be MODE_1 but we can let the device tree select this and avoid the need to call spi_setup(). This issue has been fixed by the following patch which can be cleanly applied to the 5.10/5.15/6.1.y branches.