lima: add support for depth/stencil FBO attachments and textures
Hardware supports writing back Z/S buffers and sampling from them, so add support for it.
This branch also fixes intermittent issue with rendering when load is PP-bound. Looks like tile buffer for GP is somehow used in subsequent PP job, so make it per-job. The issue was discovered while running shadow glmark2 demo.
Edited by Vasily Khoruzhick