spi: spidev: Add an entry for elgin,jg10309-01

The rv1108-elgin-r1 board has an LCD controlled via SPI in userspace.
The marking on the LCD is JG10309-01.

Add the "elgin,jg10309-01" compatible string.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20240828180057.3167190-2-festevam@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spidev.c

@@ -731,6 +731,7 @@ static int spidev_of_check(struct device *dev)
 static const struct of_device_id spidev_dt_ids[] = {
 	{ .compatible = "cisco,spi-petra", .data = &spidev_of_check },
 	{ .compatible = "dh,dhcom-board", .data = &spidev_of_check },
+	{ .compatible = "elgin,jg10309-01", .data = &spidev_of_check },
 	{ .compatible = "lineartechnology,ltc2488", .data = &spidev_of_check },
 	{ .compatible = "lwn,bk4", .data = &spidev_of_check },
 	{ .compatible = "menlo,m53cpld", .data = &spidev_of_check },