arm64: zynqmp: Add mode-pin GPIO controller DT node

Add mode-pin GPIO controller DT node in zynqmp.dtsi and also setup default
reset-gpios property for usb which is default Xilinx setup.

Signed-off-by: Piyush Mehta <piyush.mehta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/f2a1f6f541c41075ea36062857031bfc28d6d303.1652262769.git.michal.simek@amd.com
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