mei: fix spelling mistake: "botther" -> "bother"

Trivial fix to spelling mistake in dev_dbg debug message. Also
add in a missing comma.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/bus.c

@@ -549,7 +549,7 @@ int mei_cldev_disable(struct mei_cl_device *cldev)
 	}
 
 	if (bus->dev_state == MEI_DEV_POWER_DOWN) {
-		dev_dbg(bus->dev, "Device is powering down don't botther with disconnection\n");
+		dev_dbg(bus->dev, "Device is powering down, don't bother with disconnection\n");
 		err = 0;
 		goto out;
 	}