[Intel-gfx] [PATCH i-g-t] tests/kms_cursor_legacy: Remove strict vblank checking on 2x-*-vs-cursor tests.

[Chris Wilson]

Quoting Maarten Lankhorst (2017-10-18 11:43:25)
> There is no guarantee that on 2 screens the vblanks are in any way
> synchronized, so it's best to stop checking them, since doing an update
> involving multiple pipes may incur an arbitrary amount of delay.

Ah, that's a shame. Not much point in asking 2 crtcs to be updated at
the same time, if they aren't. (Give or take the lack of genlock, and
lack of Ville's tricks to synchronise clocks in sw.)
-Chris