i965: Remove the create_raw_surface vtbl hook.

i965: Remove the create_raw_surface vtbl hook.

It's a wrapper around emit_buffer_surface_state with format=RAW, pitch=1,
rw=true and the remaining arguments ordered differently.  There's no point in
having a separate vtbl pointer for that.

Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>