iio: adc: qcom-spmi-adc5: Remove unnecessary datasheet_name NULL check

datasheet_name is statically filled by a macro for every channel, and is
nor should ever be set to NULL.
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230502-iio-adc-propagate-fw-node-label-v3-4-6be5db6e6b5a@somainline.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/qcom-spmi-adc5.c

@@ -657,8 +657,7 @@ static int adc5_get_fw_channel_data(struct adc5_chip *adc,
 		chan = chan & ADC_CHANNEL_MASK;
 	}
 
-	if (chan > ADC5_PARALLEL_ISENSE_VBAT_IDATA ||
-	    !data->adc_chans[chan].datasheet_name) {
+	if (chan > ADC5_PARALLEL_ISENSE_VBAT_IDATA) {
 		dev_err(dev, "%s invalid channel number %d\n", name, chan);
 		return -EINVAL;
 	}