arm: zynq: Add initial support for Avnet MiniZed

Initial support for Avnet MiniZed board. Tested UART1 (serial console),
QSPI(Flash), SDHCI1 (eMMC), USB.

Signed-off-by: Ibai Erkiaga <ibai.erkiaga-elorza@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
3 files changed