i965/skl: Implement WaDisable1DDepthStencil
Skylake+ doesn't support setting a depth buffer to a 1D surface but it does allow pretending it's a 2D texture with a height of 1 instead. This fixes the GL_DEPTH_COMPONENT_* tests of the copyteximage piglit test (and also seems to avoid a subsequent GPU hang). Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89037 Reviewed-by:Kenneth Graunke <kenneth@whitecape.org>
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