graphics/mesa-devel: temporarily drop powerpc64le fix
> Patching for mesa-devel-25.1.b.26
> Applying distribution patches for mesa-devel-25.1.b.26
1 out of 1 hunks failed--saving rejects to meson.build.rej
> FAILED Applying distribution patch 11aaf934112c.patch with -p1
- Error code 1