schedule: ll: userspace: enable LLEXT

LLEXT is now working with userspace LL and can be enabled.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

app/overlays/ptl/ll_userspace_overlay.conf

@@ -24,15 +24,12 @@ CONFIG_COLD_STORE_EXECUTE_DEBUG=n
 CONFIG_SOF_TELEMETRY_PERFORMANCE_MEASUREMENTS=n
 CONFIG_SOF_TELEMETRY_IO_PERFORMANCE_MEASUREMENTS=n
 
-# disable loadable modules (hits privilege issues in user-space now)
-CONFIG_LLEXT_STORAGE_WRITABLE=n
-CONFIG_LLEXT_EXPERIMENTAL=n
-CONFIG_MODULES=n
-
 # some of current boot tests interfere with user-space setup
 CONFIG_SOF_BOOT_TEST_ALLOWED=n
 
 # misc features not yet compatible with user-space
 CONFIG_CROSS_CORE_STREAM=n
 CONFIG_INTEL_ADSP_MIC_PRIVACY=n
 CONFIG_XRUN_NOTIFICATIONS_ENABLE=n
+
+CONFIG_MAX_THREAD_BYTES=4