spi: xcomm: remove i2c_set_clientdata()

i2c_get_clientdata() is not being called anywhere so that we do not need
to set clientdata.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240705-dev-spi-xcomm-gpiochip-v2-3-b10842fc9636@analog.com


Signed-off-by: Mark Brown <broonie@kernel.org>