userspace: Introduce userspace proxy

Introduce initial support for userspace proxy logic. This includes
configuring the module's memory domain to ensure proper access rights and
creating intermediary functions that forward calls to the module's
interface.

Signed-off-by: Jaroslaw Stelter <Jaroslaw.Stelter@intel.com>
Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>

Author: jxstelter

src/audio/module_adapter/CMakeLists.txt

@@ -57,6 +57,10 @@ if(zephyr) ###  Zephyr ###
 		library/native_system_service.c
 	)
 
+	zephyr_library_sources_ifdef(CONFIG_SOF_USERSPACE_PROXY
+		library/userspace_proxy.c
+	)
+
 	zephyr_library_sources_ifdef(CONFIG_PASSTHROUGH_CODEC
 		module/passthrough.c
 	)