arm: Remove sksimx6 board

This board has not been converted to CONFIG_DM_MMC by the deadline.
Remove it.

Cc: Stefano Babic <sbabic@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Stefano Babic <sbabic@denx.de>

configs/sksimx6_defconfig

@@ -1,53 +0,0 @@
-CONFIG_ARM=y
-CONFIG_ARCH_MX6=y
-CONFIG_SYS_TEXT_BASE=0x17800000
-CONFIG_SPL_GPIO_SUPPORT=y
-CONFIG_SPL_LIBCOMMON_SUPPORT=y
-CONFIG_SPL_LIBGENERIC_SUPPORT=y
-CONFIG_NR_DRAM_BANKS=1
-CONFIG_ENV_SIZE=0x4000
-CONFIG_ENV_OFFSET=0x60000
-CONFIG_MX6QDL=y
-CONFIG_MX6_DDRCAL=y
-CONFIG_TARGET_SKSIMX6=y
-CONFIG_SPL_TEXT_BASE=0x00908000
-CONFIG_SPL_MMC_SUPPORT=y
-CONFIG_SPL_SERIAL_SUPPORT=y
-CONFIG_SPL=y
-CONFIG_ENV_OFFSET_REDUND=0x64000
-CONFIG_SPL_LIBDISK_SUPPORT=y
-CONFIG_DISTRO_DEFAULTS=y
-CONFIG_FIT=y
-CONFIG_FIT_VERBOSE=y
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/spl_sd.cfg"
-CONFIG_BOOTDELAY=1
-# CONFIG_USE_BOOTCOMMAND is not set
-CONFIG_SILENT_CONSOLE=y
-CONFIG_SILENT_U_BOOT_ONLY=y
-CONFIG_BOARD_EARLY_INIT_F=y
-CONFIG_SPL_FS_EXT4=y
-CONFIG_SPL_I2C_SUPPORT=y
-CONFIG_SPL_WATCHDOG_SUPPORT=y
-CONFIG_CMD_GPIO=y
-CONFIG_CMD_MMC=y
-CONFIG_CMD_CACHE=y
-CONFIG_CMD_EXT4_WRITE=y
-CONFIG_ENV_OVERWRITE=y
-CONFIG_ENV_IS_IN_MMC=y
-CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
-CONFIG_SYS_RELOC_GD_ENV_ADDR=y
-CONFIG_VERSION_VARIABLE=y
-CONFIG_DM=y
-CONFIG_BOUNCE_BUFFER=y
-CONFIG_FSL_USDHC=y
-CONFIG_MTD=y
-CONFIG_PHYLIB=y
-CONFIG_PHY_MICREL=y
-CONFIG_PHY_MICREL_KSZ90X1=y
-CONFIG_PHY_MICREL_KSZ8XXX=y
-CONFIG_FEC_MXC=y
-CONFIG_MII=y
-CONFIG_MXC_UART=y
-CONFIG_DM_THERMAL=y
-CONFIG_IMX_THERMAL=y
-CONFIG_OF_LIBFDT=y