egl: replace dead vfunc with an error

st/egl used to support eglCreatePbufferFromClientBuffer, but now that
it's gone, any call to it would segfault.

Let's return a nice error instead.

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
2 files changed