mtd: rawnand: tango: Remove the driver

The tango platform is getting removed [1], so the driver is no
longer needed.

[1] https://lore.kernel.org/linux-arm-kernel/20210120124812.2800027-1-arnd@kernel.org/T/

Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: Mans Rullgard <mans@mansr.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210120150555.1610132-1-arnd@kernel.org

drivers/mtd/nand/raw/Kconfig

@@ -102,13 +102,6 @@ config MTD_NAND_S3C2410_CLKSTOP
 	  when the is NAND chip selected or released, but will save
 	  approximately 5mA of power when there is nothing happening.
 
-config MTD_NAND_TANGO
-	tristate "Tango NAND controller"
-	depends on ARCH_TANGO || COMPILE_TEST
-	depends on HAS_IOMEM
-	help
-	  Enables the NAND Flash controller on Tango chips.
-
 config MTD_NAND_SHARPSL
 	tristate "Sharp SL Series (C7xx + others) NAND controller"
 	depends on ARCH_PXA || COMPILE_TEST

drivers/mtd/nand/raw/Makefile

@@ -10,7 +10,6 @@ obj-$(CONFIG_MTD_NAND_DENALI_PCI)	+= denali_pci.o
 obj-$(CONFIG_MTD_NAND_DENALI_DT)	+= denali_dt.o
 obj-$(CONFIG_MTD_NAND_AU1550)		+= au1550nd.o
 obj-$(CONFIG_MTD_NAND_S3C2410)		+= s3c2410.o
-obj-$(CONFIG_MTD_NAND_TANGO)		+= tango_nand.o
 obj-$(CONFIG_MTD_NAND_DAVINCI)		+= davinci_nand.o
 obj-$(CONFIG_MTD_NAND_DISKONCHIP)	+= diskonchip.o
 obj-$(CONFIG_MTD_NAND_FSMC)		+= fsmc_nand.o