USB: serial: Remove unnecessary \n's from dbg uses

#define dbg adds the newline, messages shouldn't.
Converted dbg("%s", "some string") to dbg("some string")

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index 178e4d9..4f7945e 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -368,7 +368,7 @@
 	spin_lock_irqsave(&priv->lock, flags);
 	if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
 		spin_unlock_irqrestore(&priv->lock, flags);
-		dbg("%s - write limit hit\n", __func__);
+		dbg("%s - write limit hit", __func__);
 		return 0;
 	}
 	priv->outstanding_urbs++;
@@ -446,7 +446,7 @@
 	spin_lock_irqsave(&priv->lock, flags);
 	if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
 		spin_unlock_irqrestore(&priv->lock, flags);
-		dbg("%s - write limit hit\n", __func__);
+		dbg("%s - write limit hit", __func__);
 		return 0;
 	}
 	spin_unlock_irqrestore(&priv->lock, flags);