ARM64: zynqmp: Wire up PSCI reset

Using PSCI to reset the system.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index f15dc5d..0c5d997 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -307,3 +307,8 @@
 	return 0;
 }
 #endif
+
+void reset_misc(void)
+{
+	psci_system_reset(true);
+}