boards: ace_4.0: Enable runtime log filtering with ERROR default level

Enable CONFIG_LOG_RUNTIME_FILTERING and set
CONFIG_LOG_RUNTIME_DEFAULT_LEVEL to 1 (ERROR) for all Intel ADSP ACE 4.0
platforms. This provides quiet firmware boot with minimal logging
overhead while maintaining full DEBUG compile-time capability for
dynamic log level control via IPC.

Platforms configured:
- intel_adsp_ace40_nvl
- intel_adsp_ace40_nvls

With these settings:
- Firmware boots showing only ERROR level logs (quiet startup)
- Host can dynamically increase verbosity to INFO or DEBUG via
  IPC4_ENABLE_LOGS without recompilation
- All log macros (LOG_ERR, LOG_INF, etc.) remain compiled in

Runtime filtering default level is set to INFO (3) in debug_overlay.conf
to maintain current debug build behavior where logs start at INFO level.
This ensures the same feature set is tested with runtime filtering
enabled.

This works in conjunction with the IPC4 logging handler changes that
parse logs_mask to set the appropriate runtime filter level.

Signed-off-by: Tomasz Leman <tomasz.m.leman@intel.com>

Author: tmleman

app/boards/intel_adsp_ace40_nvl.conf

@@ -55,6 +55,8 @@ CONFIG_PM_DEVICE_RUNTIME_ASYNC=n
 # Zephyr / logging
 CONFIG_LOG_BACKEND_ADSP=n
 CONFIG_WINSTREAM_CONSOLE=n
+CONFIG_LOG_RUNTIME_FILTERING=y
+CONFIG_LOG_RUNTIME_DEFAULT_LEVEL=1
 
 # Zephyr / debug: temporary, until fixed
 CONFIG_GDBSTUB=n

app/boards/intel_adsp_ace40_nvls.conf

@@ -55,6 +55,8 @@ CONFIG_PM_DEVICE_RUNTIME_ASYNC=n
 # Zephyr / logging
 CONFIG_LOG_BACKEND_ADSP=n
 CONFIG_WINSTREAM_CONSOLE=n
+CONFIG_LOG_RUNTIME_FILTERING=y
+CONFIG_LOG_RUNTIME_DEFAULT_LEVEL=1
 
 # Zephyr / debug: temporary, until fixed
 CONFIG_GDBSTUB=n

app/debug_overlay.conf

@@ -23,3 +23,10 @@ CONFIG_COLD_STORE_EXECUTE_DEBUG=y
 
 CONFIG_GDBSTUB=y
 CONFIG_GDBSTUB_ENTER_IMMEDIATELY=n
+
+# Logging options
+# Set default runtime log level to INFO (3) to maintain expected behavior in SOF CI.
+# This ensures firmware starts with INFO level logging, same as previous configuration.
+# Testing with runtime filtering enabled ensures the same feature set is validated.
+# Note: This setting has no effect if CONFIG_LOG_RUNTIME_FILTERING is disabled.
+CONFIG_LOG_RUNTIME_DEFAULT_LEVEL=3

app/os_linux_overlay.conf

@@ -7,3 +7,12 @@
 # state, so context save can be disabled
 CONFIG_ADSP_IMR_CONTEXT_SAVE=n
 CONFIG_SOF_USERSPACE_PROXY=n
+
+# Logging options
+
+# Set default runtime log level to INFO (3).
+# Note: This setting only has effect when CONFIG_LOG_RUNTIME_FILTERING is enabled.
+# By default, the runtime level equals the compile-time level, but it is explicitly
+# set here to INFO to ensure expected behavior if platform configurations set a
+# lower default level (e.g., ERROR).
+CONFIG_LOG_RUNTIME_DEFAULT_LEVEL=3