test: don't test for property names where missing

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Disable SYN_DROPPED tests if SYN_DROPPED is not defined

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
test: drop two SYN_DROPPED defines that don't do much

Makes it easier for backwards-compatibility to work.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
test: change to event name defines to older ones

These two are going to be available on all kernels we support.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
test: ifdef out a newer define

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
test: conditionally compile clock setting test

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>