kmod_scripts: filter out DMA trace overflow

The occurrence of DMA trace overflows has become so bad I need to
filter out these error messages to test module load/unload. Sad but
what can I say.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

kmod_scripts/sof_bootone.sh

@@ -8,7 +8,7 @@ sleep 1
 unset FW_BOOT
 unset ERROR
 FW_BOOT=$(dmesg | grep sof-audio | grep "boot complete")
-ERROR=$(dmesg | grep sof-audio | grep "error")
+ERROR=$(dmesg | grep sof-audio | grep -v "DSP trace buffer overflow" | grep "error")
 
 if [ ! -z "$ERROR" ] || [ -z "$FW_BOOT" ]
 then