[do not merge] App: Boards: Enable Up_down_mixer kconfig for cAVS2.5

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

Author: singalsu

app/boards/intel_adsp_cavs25.conf

@@ -79,3 +79,6 @@ CONFIG_LOG_FUNC_NAME_PREFIX_DBG=y
 CONFIG_LOG_OUTPUT_FORMAT_LINUX_TIMESTAMP=y
 CONFIG_LOG_TIMESTAMP_64BIT=y
 CONFIG_WINSTREAM_CONSOLE=n
+
+# components
+CONFIG_COMP_UP_DOWN_MIXER=y