refactor: move iaf headers to separate folder

add documentation about sources of linux kernel headers

Signed-off-by: Mateusz Jablonski <mateusz.jablonski@intel.com>

third_party/uapi/README.md

@@ -0,0 +1,24 @@
+<!---
+
+Copyright (C) 2024 Intel Corporation
+
+SPDX-License-Identifier: MIT
+
+-->
+
+
+Source locations of Linux kernel interface headers:
+
+1. https://repositories.intel.com/graphics/kernel-api/index.html
+    - dg1/i915_drm.h
+2. https://git.kernel.org/stable/h/v6.8.1
+    - drm/drm.h
+    - drm/drm_mode.h
+    - drm/drm_fourcc.h
+    - i915/i915.h
+    - xe/xe_drm.h
+3. https://github.com/intel-gpu/drm-uapi-helper/releases/tag/v2.0-rc24
+    - i915/prelim/i915.h
+    - i915/prelim/i915_prelim.h
+    - iaf/iaf_netlink.h
+     

third_party/uapi/dg1/README.md

@@ -1,2 +0,0 @@
-Source location of Linux kernel DRM/i915 interface headers:
-https://repositories.intel.com/graphics/kernel-api/index.html

third_party/uapi/iaf/iaf_netlink.h

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: MIT */
 /*
- * Copyright(c) 2021 Intel Corporation.
+ * Copyright(c) 2021 - 2023 Intel Corporation.
  *
  */