meson: Prefer 'iris' by default over 'i965'.
This changes the default driver for Intel Gen8-11 hardware to be the newer 'iris' driver rather than the older 'i965' driver. To continue using i965, pass -Dprefer-iris=false when building.
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This changes the default driver for Intel Gen8-11 hardware to be the newer 'iris' driver rather than the older 'i965' driver. To continue using i965, pass -Dprefer-iris=false when building.