arch: fw: sof common architecture section added

Common architecture tree for chapters that apply both to
SOF XTOS and SOF with Zephyr, like Components description.

Signed-off-by: Michal Wasko <[email protected]>

Author: mwasko

architectures/firmware/index.rst

@@ -6,6 +6,7 @@ Firmware Architecture
 .. toctree::
    :maxdepth: 1
 
+   sof-common/index
    sof-xtos/index
    sof-zephyr/index
    intel/index

architectures/firmware/sof-xtos/components/component-mgmt-api.rst renamed to architectures/firmware/sof-common/components/component-mgmt-api.rst

@@ -0,0 +1,12 @@
+.. _sof-common:
+
+SOF Common Architecture
+#######################
+
+Architecture chapters and details that are common both for SOF Legacy and SOF
+with Zephyr.
+
+.. toctree::
+   :maxdepth: 1
+
+   components/index

architectures/firmware/sof-xtos/components/component-overview.rst renamed to architectures/firmware/sof-common/components/component-overview.rst

@@ -11,6 +11,5 @@ SOF with XTOS Architecture
    pm-runtime/index
    schedulers
    drivers/index
-   components/index
    pipelines/index
    kd_integration/index