staging: rtlwifi: fix spelling mistake "notity" -> "notify"

There are two spelling mistake in RT_TRACE messages. Fix them.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>