[RFC PATCH] pci: controller: split designware into *core* and *host*

No functional change. Split the designware core driver into *core* driver and *host* only driver. This is in preparation to add endpoint support in designware. The *endpoint* driver will reuse the *core* driver. This also modifies the dra7xx code to use the new architecture. TODO: All other

[RFC PATCH] pci: controller: split designware into *core* and *host*

No functional change. Split the designware core driver into *core* driver and *host* only driver. This is in preparation to add endpoint support in designware. The *endpoint* driver will reuse the *core* driver. This also modifies the dra7xx code to use the new architecture. TODO: All other