spi: spidev: add compatible for arduino spi mcu interface

Add compatible entry in spidev describing in Arduino UnoQ single-board
computer the interface between Qualcomm QRB2210 microprocessor and
STMicroelectronics STM32U585 microcontroller.
It is handled in user space by the arduino-router service.

Signed-off-by: Riccardo Mereu <r.mereu@arduino.cc>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://patch.msgid.link/20251120155825.121483-4-r.mereu.kernel@arduino.cc
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: SuMere

drivers/spi/spidev.c

@@ -704,6 +704,7 @@ static const struct class spidev_class = {
  */
 static const struct spi_device_id spidev_spi_ids[] = {
 	{ .name = /* abb */ "spi-sensor" },
+	{ .name = /* arduino */ "unoq-mcu" },
 	{ .name = /* cisco */ "spi-petra" },
 	{ .name = /* dh */ "dhcom-board" },
 	{ .name = /* elgin */ "jg10309-01" },
@@ -737,6 +738,7 @@ static int spidev_of_check(struct device *dev)
 
 static const struct of_device_id spidev_dt_ids[] = {
 	{ .compatible = "abb,spi-sensor", .data = &spidev_of_check },
+	{ .compatible = "arduino,unoq-mcu", .data = &spidev_of_check },
 	{ .compatible = "cisco,spi-petra", .data = &spidev_of_check },
 	{ .compatible = "dh,dhcom-board", .data = &spidev_of_check },
 	{ .compatible = "elgin,jg10309-01", .data = &spidev_of_check },