arm: socfpga: Add samtec VIN|ING board

Add support for board based on the popular Altera Cyclone V SoC.
This board has the following properties:
 - 1 GiB of DRAM
 - 1 Gigabit ethernet
 - 1 USB gadget port
 - 1 USB host port with an on-board hub
 - 2 QSPI NORs connected to the Cadence QSPI core
 - Multiple I2C EEPROMs and one I2C temperature sensor

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Chin Liang See <clsee@altera.com>
---
V2: Update the defconfig as per Tom's request
diff --git a/board/samtec/vining_fpga/MAINTAINERS b/board/samtec/vining_fpga/MAINTAINERS
new file mode 100644
index 0000000..c2002fe
--- /dev/null
+++ b/board/samtec/vining_fpga/MAINTAINERS
@@ -0,0 +1,5 @@
+VINING FPGA BOARD
+M:	Marek Vasut <marex@denx.de>
+S:	Maintained
+F:	include/configs/socfpga_vining_fpga.h
+F:	configs/socfpga_vining_fpga_defconfig