RX Buffer memory valid vector
Remove memory valid vector on RX Buffer. It is not neccessary and it will save some logic. When the RX Buffer is empty (read_pointer = write_pointer) all zeroes should be returned on the output.
Remove memory valid vector on RX Buffer. It is not neccessary and it will save some logic. When the RX Buffer is empty (read_pointer = write_pointer) all zeroes should be returned on the output.