samples: Bluetooth: Fix stack size for unicast audio server

The unicast audio server is actually decoding in the RX
thread, and not the system workqueue.

This is a temporary fix, as ideally it would do the
decoding in a separate thread to avoid taking too much
time in the system threads.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

samples/bluetooth/bap_unicast_client/boards/nrf5340_audio_dk_nrf5340_cpuapp.conf

@@ -1,9 +1,9 @@
 # For LC3 the following configs are needed
 CONFIG_FPU=y
 CONFIG_LIBLC3=y
-# The LC3 codec uses a large amount of stack. This app runs the codec in the work-queue, hence
-# inctease stack size for that thread.
-CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
+# The LC3 codec uses a large amount of stack. This app runs the decoding codec in the RX thread,
+# hence increase the stack size for that thread.
+CONFIG_BT_RX_STACK_SIZE=4096
 
 CONFIG_BT_BUF_EVT_RX_SIZE=255
 CONFIG_BT_BUF_ACL_RX_SIZE=255