usb: musb: drop unneeded musb_debug trickery

We have a generic way of enabling/disabling
different debug messages on a driver called
DYNAMIC_PRINTK. Anyone interested in enabling
just part of the debug messages, please read
the documentation under:

Documentation/dynamic-debug-howto.txt

for information on how to use that great
infrastructure.

Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/am35x.c

@@ -151,7 +151,7 @@ static void otg_timer(unsigned long _musb)
 	 * status change events (from the transceiver) otherwise.
 	 */
 	devctl = musb_readb(mregs, MUSB_DEVCTL);
-	DBG(7, "Poll devctl %02x (%s)\n", devctl,
+	dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
 		otg_state_string(musb->xceiv->state));
 
 	spin_lock_irqsave(&musb->lock, flags);
@@ -203,7 +203,7 @@ static void am35x_musb_try_idle(struct musb *musb, unsigned long timeout)
 	/* Never idle if active, or when VBUS timeout is not set as host */
 	if (musb->is_active || (musb->a_wait_bcon == 0 &&
 				musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
-		DBG(4, "%s active, deleting timer\n",
+		dev_dbg(musb->controller, "%s active, deleting timer\n",
 			otg_state_string(musb->xceiv->state));
 		del_timer(&otg_workaround);
 		last_timer = jiffies;
@@ -211,12 +211,12 @@ static void am35x_musb_try_idle(struct musb *musb, unsigned long timeout)
 	}
 
 	if (time_after(last_timer, timeout) && timer_pending(&otg_workaround)) {
-		DBG(4, "Longer idle timer already pending, ignoring...\n");
+		dev_dbg(musb->controller, "Longer idle timer already pending, ignoring...\n");
 		return;
 	}
 	last_timer = timeout;
 
-	DBG(4, "%s inactive, starting idle timer for %u ms\n",
+	dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
 		otg_state_string(musb->xceiv->state),
 		jiffies_to_msecs(timeout - jiffies));
 	mod_timer(&otg_workaround, timeout);
@@ -305,7 +305,7 @@ static irqreturn_t am35x_musb_interrupt(int irq, void *hci)
 		}
 
 		/* NOTE: this must complete power-on within 100 ms. */
-		DBG(2, "VBUS %s (%s)%s, devctl %02x\n",
+		dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
 				drvvbus ? "on" : "off",
 				otg_state_string(musb->xceiv->state),
 				err ? " ERROR" : "",