iio: adc: ad7192: Silence no spi_device_id warnings

SPI devices use the spi_device_id for module autoloading even on
systems using device tree, after commit 5fa6863ba692 ("spi: Check
we have a spi_device_id for each DT compatible"), kernel warns as
follows since the spi_device_id is missing:

SPI driver ad7192 has no spi_device_id for adi,ad7190
SPI driver ad7192 has no spi_device_id for adi,ad7193
SPI driver ad7192 has no spi_device_id for adi,ad7195

Add spi_device_id entries to silence the warnings, and ensure driver
module autoloading works.

Signed-off-by: Wei Yongjun <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/adc/ad7192.c

···
 	st->int_vref_mv = ret / 1000;
 
 	st->chip_info = of_device_get_match_data(&spi->dev);
+	if (!st->chip_info)
+		st->chip_info = (void *)spi_get_device_id(spi)->driver_data;
 	indio_dev->name = st->chip_info->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
···
 };
 MODULE_DEVICE_TABLE(of, ad7192_of_match);
 
+static const struct spi_device_id ad7192_ids[] = {
+	{ "ad7190", (kernel_ulong_t)&ad7192_chip_info_tbl[ID_AD7190] },
+	{ "ad7192", (kernel_ulong_t)&ad7192_chip_info_tbl[ID_AD7192] },
+	{ "ad7193", (kernel_ulong_t)&ad7192_chip_info_tbl[ID_AD7193] },
+	{ "ad7195", (kernel_ulong_t)&ad7192_chip_info_tbl[ID_AD7195] },
+	{}
+};
+MODULE_DEVICE_TABLE(spi, ad7192_ids);
+
 static struct spi_driver ad7192_driver = {
 	.driver = {
 		.name	= "ad7192",
 		.of_match_table = ad7192_of_match,
 	},
 	.probe		= ad7192_probe,
+	.id_table	= ad7192_ids,
 };
 module_spi_driver(ad7192_driver);