arm64: dts: zynqmp: Wire zynqmp qspi controller

Add missing ZynqMP qspi IP. It works in single mode only.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/5cebbc59a452f282c4ce0f0e1dffecadac8f126a.1611224800.git.michal.simek@xilinx.com