[Intel-gfx] [CI 2/2] drm/i915/execlists: Move RCS mmio workaround to new common wa_list

We can move the remaining RCS workarounds applied to only gen8 to the engine->wa_list, and then reduce all engine->init_hw callbacks to common code. The benefit of using the new wa_list is that we verify that the registers are indeed restored and keep their magic values. v2: INSTPM_FORCE_ORDERING

[Intel-gfx] [CI 2/2] drm/i915/execlists: Move RCS mmio workaround to new common wa_list

We can move the remaining RCS workarounds applied to only gen8 to the engine->wa_list, and then reduce all engine->init_hw callbacks to common code. The benefit of using the new wa_list is that we verify that the registers are indeed restored and keep their magic values. v2: INSTPM_FORCE_ORDERING