ACPI / scan: Change the level of _DEP-related messages to KERN_DEBUG

Two _DEP-related failure messages are printed as dev_err() which is
unnecessary and annoying.  Use dev_dbg() to print them.

While at it, one of the messages should actually say it is related
to _DEP, so modify it to that effect.

Fixes: 40e7fcb1 (ACPI: Add _DEP support to fix battery issue on Asus T100TA)
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/scan.c

@@ -2107,7 +2107,7 @@ static void acpi_device_dep_initialize(struct acpi_device *adev)
 	status = acpi_evaluate_reference(adev->handle, "_DEP", NULL,
 					&dep_devices);
 	if (ACPI_FAILURE(status)) {
-		dev_err(&adev->dev, "Failed to evaluate _DEP.\n");
+		dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n");
 		return;
 	}
 
@@ -2117,7 +2117,7 @@ static void acpi_device_dep_initialize(struct acpi_device *adev)
 
 		status = acpi_get_object_info(dep_devices.handles[i], &info);
 		if (ACPI_FAILURE(status)) {
-			dev_err(&adev->dev, "Error reading device info\n");
+			dev_dbg(&adev->dev, "Error reading _DEP device info\n");
 			continue;
 		}