u_blitter: port radv 3D blit coords logic.

The current code fails a lot of VK CTS tests, this fixes them all:
dEQP-VK*blit_image*3d*

Cc: 20.3 <mesa-stable>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7499>
(cherry picked from commit ea034c981b9649c4999e3b7f4164f27213e736b3)
diff --git a/.pick_status.json b/.pick_status.json
index 23be56c..353e55f 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -976,7 +976,7 @@
         "description": "u_blitter: port radv 3D blit coords logic.",
         "nominated": true,
         "nomination_type": 0,
-        "resolution": 0,
+        "resolution": 1,
         "master_sha": null,
         "because_sha": null
     },