app: overlays: ptl: add ll_usespace_overlay.conf

Add an overlay for Intel 'ptl' target that allows to build
SOF with all audio pipeline code running in Zephyr user-sapce.

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>

Author: kv2019i

app/overlays/ptl/ll_userspace_overlay.conf

@@ -0,0 +1,20 @@
+CONFIG_SOF_USERSPACE_LL=y
+
+# temporary (but for now mandatory) settings
+CONFIG_SOF_ZEPHYR_USERSPACE_MODULE_HEAP_SIZE=16384
+
+# make the drivers work in user-space
+CONFIG_SOF_USERSPACE_INTERFACE_DMA=y
+CONFIG_DAI_USERSPACE=y
+
+# disable features that don't work in user-space (at least yet)
+CONFIG_COLD_STORE_EXECUTE_DEBUG=n
+CONFIG_CROSS_CORE_STREAM=n
+CONFIG_INTEL_ADSP_MIC_PRIVACY=n
+CONFIG_XRUN_NOTIFICATIONS_ENABLE=n
+CONFIG_SOF_BOOT_TEST_ALLOWED=n
+
+# disable llext (hits privilege issues in user-space now)
+CONFIG_LLEXT_STORAGE_WRITABLE=n
+CONFIG_LLEXT_EXPERIMENTAL=n
+CONFIG_MODULES=n