usb: dwc3: core: purge dev_dbg() calls

The last few dev_dbg() messages are converted to
tracepoints and we can finally ignore dev_dbg()
messages during debug sessions.

Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 22b47973..de5e01f 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -272,7 +272,8 @@
 
 	for (n = 0; n < dwc->num_event_buffers; n++) {
 		evt = dwc->ev_buffs[n];
-		dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n",
+		dwc3_trace(trace_dwc3_core,
+				"Event buf %p dma %08llx length %d\n",
 				evt->buf, (unsigned long long) evt->dma,
 				evt->length);
 
@@ -608,12 +609,13 @@
 		reg |= DWC3_GCTL_GBLHIBERNATIONEN;
 		break;
 	default:
-		dev_dbg(dwc->dev, "No power optimization available\n");
+		dwc3_trace(trace_dwc3_core, "No power optimization available\n");
 	}
 
 	/* check if current dwc3 is on simulation board */
 	if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) {
-		dev_dbg(dwc->dev, "it is on FPGA board\n");
+		dwc3_trace(trace_dwc3_core,
+				"running on FPGA platform\n");
 		dwc->is_fpga = true;
 	}