Drop virtclass override in favor of class override
(From OE-Core rev: b2e2cf532ebbeb7463b45193fa684e785e299c99)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>