icorem6: Recover missing nand defconfig

nand defconfig is accidentally removed from below
commit, so recover the same.
"icorem6: Make SPL to pick suitable fdt"
(sha1: 15455a6b01)

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

configs/imx6qdl_icore_nand_defconfig

@@ -0,0 +1,45 @@
+CONFIG_ARM=y
+CONFIG_ARCH_MX6=y
+CONFIG_SPL_GPIO_SUPPORT=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_TARGET_MX6Q_ICORE=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL_WATCHDOG_SUPPORT=y
+# CONFIG_CMD_BMODE is not set
+CONFIG_VIDEO=y
+CONFIG_DEFAULT_DEVICE_TREE="imx6q-icore"
+CONFIG_OF_LIST="imx6q-icore imx6dl-icore"
+CONFIG_FIT=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,ENV_IS_IN_NAND"
+CONFIG_BOOTDELAY=3
+CONFIG_SPL=y
+CONFIG_SPL_DMA_SUPPORT=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="icorem6qdl> "
+# CONFIG_CMD_IMLS is not set
+CONFIG_CMD_MEMTEST=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_NAND=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_CMD_UBI=y
+# CONFIG_BLK is not set
+CONFIG_SYS_I2C_MXC=y
+# CONFIG_DM_MMC_OPS is not set
+CONFIG_NAND_MXS=y
+CONFIG_FEC_MXC=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX6=y
+CONFIG_MXC_UART=y
+CONFIG_IMX_THERMAL=y
+CONFIG_VIDEO_IPUV3=y