Test failure with Smartfusion2 emac block (msf2-emac)

[Thomas Huth]

 Hi Subbaraya,

today, I noticed that there is a test failure with msf2-emac when
running the device-introspect-test in slow mode. Either run:

 make check-qtest-aarch64 SPEED=slow

or as a shortcut:

 make tests/qtest/device-introspect-test
 QTEST_QEMU_BINARY="aarch64-softmmu/qemu-system-aarch64" \
  ./tests/qtest/device-introspect-test -m slow

Then the test fails with:

Unexpected error in error_set_from_qdev_prop_error() at
hw/core/qdev-properties.c:1251:
Property 'msf2-emac.netdev' can't take value 'hub0port0', it's in use

Could you please have a look?

 Thanks,
  Thomas