arm: zynq: Add support for DLC20 board

Xilinx DLC20 has I2C0 with EEPROM(1KB), UART1, GPIO, SD0 (EMMC 4GB),
USB0 device, ENET0, QSPI (16MB) and DDR(two of 256MB each).

Boards have mix of Winbond/ST QSPIs.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
4 files changed