vo_opengl: refactor performance data properties

Instead of having 9 different properties, requiring 18 different
VOCTRLs to read them all, they are now exposed as a single property.
This is not only cleaner (since they're all together) but also allows
querying all 9 of them with only a single VOCTRL (by using
mp.get_property_native).

(The extra factor of 2 was due to an extra query being needed to get the
type, which is now also unnecessary)

This makes it much easier to access performance metrics from within a
lua script, and also makes it easier to just show a readable, formatted
version via show-text.

0 files changed, 0 insertions, 0 deletions