check-sof-logger: etrace is not available in all configurations

The "etrace" debugfs file is not available in all SOF
configurations, so it cannot be used to detect whether the DSP
has booted.

Use "/proc/asound/card0/id" instead.

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>

Author: kv2019i

test-case/check-sof-logger.sh

@@ -174,14 +174,20 @@ reload_drivers()
 
     "${TOPDIR}"/tools/kmod/sof_insert.sh
 
+    # sof-test assumes SOF card to be loaded as first (card0)
+    # card in the system
+    CARD_NODE="/proc/asound/card0/id"
+
     # The DSP may unfortunately need multiple retries to boot, see
     # https://github.com/thesofproject/sof/issues/3395
-    dlogi "Polling /sys/kernel/debug/sof/etrace, waiting for DSP boot..."
+    dlogi "Polling ${CARD_NODE}, waiting for DSP boot..."
     for i in $(seq 1 5); do
-        if sudo test -e /sys/kernel/debug/sof/etrace; then break; fi
+        if sudo test -e ${CARD_NODE} ; then
+            dlogi "Found ${CARD_NODE}."
+            break;
+        fi
         sleep 1
     done
-    dlogi "Found /sys/kernel/debug/sof/etrace."
 }
 
 main()