ASoC: SOF: Intel: mtl: remove use of __func__ in dev_dbg

The module and function information can be added with
'modprobe foo dyndbg=+pmf'
Suggested-by: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220616215351.135643-6-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/mtl.c

@@ -540,8 +540,7 @@ static irqreturn_t mtl_ipc_irq_thread(int irq, void *context)
 
 	if (!ipc_irq) {
 		/* This interrupt is not shared so no need to return IRQ_NONE. */
-		dev_dbg_ratelimited(sdev->dev, "%s nothing to do in IPC IRQ thread\n",
-				    __func__);
+		dev_dbg_ratelimited(sdev->dev, "nothing to do in IPC IRQ thread\n");
 	}
 
 	return IRQ_HANDLED;