xilinx_zynq_a9_qemu with RTEMS 6 keyboard input is ignored

[junkes]

running test programs with keyboard input. Is ignored on 
xilinx_zynq_a9_qemu

qemu-system-arm -no-reboot -net none -serial null -serial mon:stdio -M 
xilinx-zynq-a9 -m 256M -nographic -kernel 
./external/rtems/build/arm/xilinx_zynq_a9_qemu/testsuites/samples/fileio.exe
qemu-system-arm: warning: nic cadence_gem.0 has no peer
qemu-system-arm: warning: nic cadence_gem.1 has no peer


*** BEGIN OF TEST FILE I/O ***
*** TEST VERSION: 6.0.0.407e351e11d3c4d0db8eb2d23ae2554f35f31697
*** TEST STATE: USER_INPUT
*** TEST BUILD:
*** TEST TOOLS: 10.2.1 20210205 (RTEMS 6, RSB 
61dcadee0825867ebe51f9f367430ef75b8fe9c0-modified, Newlib d4a756f)
Press any key to start file I/O sample (20s remaining)
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