serial: samsung: Fix build for non-Exynos4210 devices

exynos4120_serial_drv_data is only defined when building with support
for Exynos4210 so use the already provided define to ensure that we
don't reference it when building for other SoCs.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
[kgene.kim@samsung.com: Fixed build warning]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index efe3756..f96f37b 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1649,7 +1649,7 @@
 #ifdef CONFIG_OF
 static const struct of_device_id s3c24xx_uart_dt_match[] = {
 	{ .compatible = "samsung,exynos4210-uart",
-		.data = &exynos4210_serial_drv_data },
+		.data = (void *)EXYNOS4210_SERIAL_DRV_DATA },
 	{},
 };
 MODULE_DEVICE_TABLE(of, s3c24xx_uart_dt_match);