app: Add overlay to enable compr offload support (mp3, aac and vorbis)

The needed libraries should be placed in
sof/../cadence_libs/ directory if the overlay is used.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

Author: ujfalusi

app/compr_overlay.conf

@@ -0,0 +1,14 @@
+# the cadence_libs directory should be in one level up from the sof
+# project dir: sof/../cadence_libs/
+# which is zephyr/../cadence_libs/
+
+CONFIG_CADENCE_CODEC=y
+CONFIG_CADENCE_CODEC_MP3_DEC=y
+CONFIG_CADENCE_CODEC_MP3_DEC_LIB="../cadence_libs/xa_mp3_dec.a"
+CONFIG_CADENCE_CODEC_MP3_ENC=y
+CONFIG_CADENCE_CODEC_MP3_ENC_LIB="../cadence_libs/xa_mp3_enc.a"
+CONFIG_CADENCE_CODEC_AAC_DEC=y
+CONFIG_CADENCE_CODEC_AAC_DEC_LIB="../cadence_libs/xa_aac_dec.a"
+CONFIG_CADENCE_CODEC_VORBIS_DEC=y
+CONFIG_CADENCE_CODEC_VORBIS_DEC_LIB="../cadence_libs/xa_vorbis_dec.a"
+