BootLinuxConsoleTest: Test the SmartFusion2 board

BootLinuxConsoleTest: Test the SmartFusion2 board

Similar to the x86_64/pc test, it boots a Linux kernel on an
Emcraft board and verify the serial is working.

If ARM is a target being built, "make check-acceptance" will
automatically include this test by the use of the "arch:arm" tags.

Alternatively, this test can be run using:

  $ avocado run -t arch:arm tests/acceptance
  $ avocado run -t machine:emcraft_sf2 tests/acceptance

Based on the recommended test setup from Subbaraya Sundeep:
https://lists.gnu.org/archive/html/qemu-devel/2017-05/msg03810.html

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20190520220635.10961-3-f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>