HID: input: lower message severity of 'No inputs registered, leaving' to debug

Plugging in a "Blue snowball" microphone always shows the
error 'No inputs registered, leaving', but the device functions as
intended.

When a HID device is started using the function hid_hw_start() and
the argument HID_CONNECT_DEFAULT it will try all various hid connect
requests. Not all devices will create an input device and so the
message is needlessly noisy.  Decrease it to debug instead.

[[email protected]: edit shortlog]
Signed-off-by: Mario Limonciello <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

Author: superm1

drivers/hid/hid-input.c

@@ -2343,7 +2343,7 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
 	}
 
 	if (list_empty(&hid->inputs)) {
-		hid_err(hid, "No inputs registered, leaving\n");
+		hid_dbg(hid, "No inputs registered, leaving\n");
 		goto out_unwind;
 	}