mtd: rawnand: denali_dt: use UCLASS_MTD instead of UCLASS_MISC

UCLASS_MTD is a better fit for NAND drivers.

Make NAND_DENALI_DT depend on DM_MTD, which is needed to compile
drivers/mtd/mtd-uclass.c

Also, make ARCH_UNIPHIER select DM_MTD because all the defconfig
of this platform enables NAND_DENALI_DT.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1236315..f04b6a6 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1548,6 +1548,7 @@
 	select DM_GPIO
 	select DM_I2C
 	select DM_MMC
+	select DM_MTD
 	select DM_RESET
 	select DM_SERIAL
 	select DM_USB
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 7814d84..23201ca 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -116,7 +116,7 @@
 config NAND_DENALI_DT
 	bool "Support Denali NAND controller as a DT device"
 	select NAND_DENALI
-	depends on OF_CONTROL && DM
+	depends on OF_CONTROL && DM_MTD
 	help
 	  Enable the driver for NAND flash on platforms using a Denali NAND
 	  controller as a DT device.
diff --git a/drivers/mtd/nand/raw/denali_dt.c b/drivers/mtd/nand/raw/denali_dt.c
index 587e480..759ad40 100644
--- a/drivers/mtd/nand/raw/denali_dt.c
+++ b/drivers/mtd/nand/raw/denali_dt.c
@@ -160,7 +160,7 @@
 
 U_BOOT_DRIVER(denali_nand_dt) = {
 	.name = "denali-nand-dt",
-	.id = UCLASS_MISC,
+	.id = UCLASS_MTD,
 	.of_match = denali_nand_dt_ids,
 	.probe = denali_dt_probe,
 	.priv_auto_alloc_size = sizeof(struct denali_nand_info),
@@ -171,7 +171,7 @@
 	struct udevice *dev;
 	int ret;
 
-	ret = uclass_get_device_by_driver(UCLASS_MISC,
+	ret = uclass_get_device_by_driver(UCLASS_MTD,
 					  DM_GET_DRIVER(denali_nand_dt),
 					  &dev);
 	if (ret && ret != -ENODEV)