spi: rb4xx: depend on OF

There's no support for non OF platforms. Better to depend on OF
explicitly.

Also fixes a warning/error about the dt table being unused because of
of_match_ptr on non OF platforms.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Message-ID: <20250826212413.15065-2-rosenp@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: neheb

drivers/spi/Kconfig

@@ -917,6 +917,7 @@ config SPI_ROCKCHIP_SFC
 config SPI_RB4XX
 	tristate "Mikrotik RB4XX SPI master"
 	depends on SPI_MASTER && ATH79
+	depends on OF
 	help
 	  SPI controller driver for the Mikrotik RB4xx series boards.
 

drivers/spi/spi-rb4xx.c

@@ -199,7 +199,7 @@ static struct platform_driver rb4xx_spi_drv = {
 	.remove = rb4xx_spi_remove,
 	.driver = {
 		.name = "rb4xx-spi",
-		.of_match_table = of_match_ptr(rb4xx_spi_dt_match),
+		.of_match_table = rb4xx_spi_dt_match,
 	},
 };