meson: set HAVE_VA_X11 when applicable

[evelikov]

Without the define, we'll end without the Xorg auth whenever the DRM display is used.

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Team please consider porting this for the stable releases. Thanks

[evelikov]

v2: move to va/meson.build, consistently use WITH_X11 (current code uses only x11_dep.found())

[evelikov]

@ceyusa as the original author of the meson build, do you mind having a look?

[evelikov]

@XinfengZhang @uartie humble ping?

[ceyusa]

otherwise, it looks good and necessary for completeness. I agree on back porting it to stable release.

[evelikov]

It seems there is also another issue related to meson x11 path, here:

https://github.com/intel/libva/blob/0a989c9f0af69dcb15253945228c53780f019b79/meson.build#L91

Isn't that a typo: s/with_glx/with_x11/?

Nope, the check is correct - as the error message just below it says.

[dvrogozh]

It seems there is also another issue related to meson x11 path, here: https://github.com/intel/libva/blob/0a989c9f0af69dcb15253945228c53780f019b79/meson.build#L91

Isn't that a typo: s/with_glx/with_x11/?

Nope, the check is correct - as the error message just below it says.

Yep. You are right.