Don't overflow the buffer! Compare the index for overflow not the position.
  Read/write of 0 returns 0 even when non-blocking.

This would break the read (non-posted) and write (posted) ordering that Wishbone depends on.

Currently hardcode SDWB address as hardware does not support it.

Fixed bugs in kernel etherbone:
  record_len was shadowed by redeclation
  wrote maximum of possible bytes instead of minimum
  added non-blocking IO support

Bug: std_match is needed when comparing '-'s

stub wishbone device added for testing

Implement a wishbone streaming interface bridge from the Avalon RX stream

Add driver stub code

Modified PLL for two outputs
Added power on reset
Re-instantiated the PCIe megafunction