avocado/ppc_virtex_ml507.py: check TCG accel in test_ppc_virtex_ml507()

This test times out when running in an IBM POWER host and --disable-tcg.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220310183011.110391-10-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
1 file changed