mmc: sdhci-esdhc-imx: Remove non-DT stub

i.MX has been converted to a devicetree only platform, so remove
the non-DT stub for sdhci_esdhc_imx_probe_dt().

Also, make the driver depend on OF now.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20210314230824.148969-1-festevam@gmail.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/Kconfig

@@ -278,6 +278,7 @@ config MMC_SDHCI_ESDHC_IMX
 	tristate "SDHCI support for the Freescale eSDHC/uSDHC i.MX controller"
 	depends on ARCH_MXC || COMPILE_TEST
 	depends on MMC_SDHCI_PLTFM
+	depends on OF
 	select MMC_SDHCI_IO_ACCESSORS
 	select MMC_CQHCI
 	help

drivers/mmc/host/sdhci-esdhc-imx.c

@@ -1453,7 +1453,6 @@ static const struct cqhci_host_ops esdhc_cqhci_ops = {
 	.dumpregs	= esdhc_sdhci_dumpregs,
 };
 
-#ifdef CONFIG_OF
 static int
 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
 			 struct sdhci_host *host,
@@ -1505,15 +1504,6 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
 
 	return 0;
 }
-#else
-static inline int
-sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
-			 struct sdhci_host *host,
-			 struct pltfm_imx_data *imx_data)
-{
-	return -ENODEV;
-}
-#endif
 
 static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
 {