ARM: davinci: Delete DM646x board files

The interest of maintaining the DaVinci DM644x board files seems
very low. Patches to convert the EVM board to use GPIO descriptors
has not been reviewed, tested or merged for several merge
windows in a row, see link below.

When I look in the logs for the board files I see nothing but
generic kernel maintenance and no testing on real hardware for
years.

I conclude the DM646x board files are unused and can be deleted.

Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Arnd Bergmann <arnd@kernel.org>
Cc: Matt Porter <mporter@konsulko.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Link: https://lore.kernel.org/linux-arm-kernel/20220507124536.171930-2-linus.walleij@linaro.org/Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-davinci/Kconfig

@@ -24,11 +24,6 @@ config ARCH_DAVINCI_DM355
 	select DAVINCI_AINTC
 	select ARCH_DAVINCI_DMx
 
-config ARCH_DAVINCI_DM646x
-	bool "DaVinci 646x based system"
-	select DAVINCI_AINTC
-	select ARCH_DAVINCI_DMx
-
 config ARCH_DAVINCI_DA830
 	bool "DA830/OMAP-L137/AM17x based system"
 	depends on !ARCH_DAVINCI_DMx || (AUTO_ZRELADDR && ARM_PATCH_PHYS_VIRT)
@@ -77,18 +72,6 @@ config MACH_DM355_LEOPARD
 	  Configure this option to specify the whether the board used
 	  for development is a DM355 Leopard board.
 
-config MACH_DAVINCI_DM6467_EVM
-	bool "TI DM6467 EVM"
-	default ARCH_DAVINCI_DM646x
-	depends on ARCH_DAVINCI_DM646x
-	select MACH_DAVINCI_DM6467TEVM
-	help
-	  Configure this option to specify the whether the board used
-	  for development is a DM6467 EVM
-
-config MACH_DAVINCI_DM6467TEVM
-	bool
-
 config MACH_DAVINCI_DM365_EVM
 	bool "TI DM365 EVM"
 	default ARCH_DAVINCI_DM365

arch/arm/mach-davinci/Makefile

@@ -11,7 +11,6 @@ obj-$(CONFIG_DAVINCI_MUX)		+= mux.o
 
 # Chip specific
 obj-$(CONFIG_ARCH_DAVINCI_DM355)        += dm355.o devices.o
-obj-$(CONFIG_ARCH_DAVINCI_DM646x)       += dm646x.o devices.o
 obj-$(CONFIG_ARCH_DAVINCI_DM365)	+= dm365.o devices.o
 obj-$(CONFIG_ARCH_DAVINCI_DA830)	+= da830.o devices-da8xx.o usb-da8xx.o
 obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= da850.o devices-da8xx.o usb-da8xx.o
@@ -20,7 +19,6 @@ obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= da850.o devices-da8xx.o usb-da8xx.o
 obj-$(CONFIG_MACH_DA8XX_DT)		+= da8xx-dt.o pdata-quirks.o
 obj-$(CONFIG_MACH_DAVINCI_DM355_EVM)	+= board-dm355-evm.o
 obj-$(CONFIG_MACH_DM355_LEOPARD)	+= board-dm355-leopard.o
-obj-$(CONFIG_MACH_DAVINCI_DM6467_EVM)	+= board-dm646x-evm.o
 obj-$(CONFIG_MACH_DAVINCI_DM365_EVM)	+= board-dm365-evm.o
 obj-$(CONFIG_MACH_DAVINCI_DA830_EVM)	+= board-da830-evm.o
 obj-$(CONFIG_MACH_DAVINCI_DA850_EVM)	+= board-da850-evm.o