radeonsi: move sid.h/r600d_common.h to a common place.

Step one to merging radv would be to move some files around.

This only adds the include path to r600/radeonsi, because later
we want to avoid having to add it to the generic target paths.

Acked-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
13 files changed