aarch64/zynqmp: Use IRQs for management console

Swap the zynqmp management console to interrupt-driven operation to
avoid losing data in under-polled situations.

bsps/aarch64/xilinx-zynqmp/console/console.c

@@ -225,7 +225,7 @@ rtems_status_code console_initialize(
   if ( zynqmp_mgmt_uart_context.port != 0 ) {
     rtems_termios_device_install(
       "/dev/ttyMGMT0",
-      &ns16550_handler_polled,
+      &ns16550_handler_interrupt,
       NULL,
       &zynqmp_mgmt_uart_context.base
     );

bsps/aarch64/xilinx-zynqmp/include/bsp.h

@@ -45,6 +45,8 @@
 
 #include <bspopts.h>
 
+#define BSP_FEATURE_IRQ_EXTENSION
+
 #ifndef ASM
 
 #include <bsp/default-initial-extension.h>