imx: Add variscite DART-6UL Evaluation Kit

Port for the DART-6UL Evaluation Kit SBC. Based on the variscite
DART-6UL iMX6ULL SoM.

CPU:   Freescale i.MX6ULL rev1.1 900 MHz (running at 396 MHz)
CPU:   Commercial temperature grade (0C to 95C) at 43C
Reset cause: POR
Model: Variscite DART-6UL Evaluation Kit
Board: Variscite DART-6UL Evaluation Kit
DRAM:  512 MiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
In:    serial@02020000
Out:   serial@02020000
Err:   serial@02020000
Net:   FEC0

Working:
 - Eth0
 - i2c
 - MMC/SD
 - eMMC
 - USB host
 - UART 1

Note: LCDIF porting needs DM_VIDEO
https://lists.denx.de/pipermail/u-boot/2019-April/365506.html

Signed-off-by: Parthiban Nallathambi <parthitce@gmail.com>
diff --git a/board/variscite/dart_6ul/Kconfig b/board/variscite/dart_6ul/Kconfig
new file mode 100644
index 0000000..1765af1
--- /dev/null
+++ b/board/variscite/dart_6ul/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_DART_6UL
+
+config SYS_BOARD
+	default "dart_6ul"
+
+config SYS_VENDOR
+	default "variscite"
+
+config SYS_CONFIG_NAME
+	default "dart_6ul"
+
+endif