tests/qtest: don't attempt to clock_step while waiting for virtio ISR

This replicates the changes from 92cb8f8bf6 (tests/qtest: remove
clock_steps from virtio tests) as there are no timers in the virtio
code. We still busy wait and timeout though.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-3-alex.bennee@linaro.org>
2 files changed