MFC r207852:

MFC r207852:
  SiS190 supports RX 10 bytes padding, CRC stripping as well as VLAN
  hardware tag insertion/stripping. Remove conditional code that
  disables these hardware features on SiS190. Also nuke RX fixup code
  which is no more required on strict-alignment architectures because
  SiS190 supports RX 10 bytes padding.
  Now all hardware features except jumbo frame and WOL are supported.
  Thanks to Masa Murayama who confirmed SiS190 also has the same
  hardware features of SiS191.
  I guess the only difference between SiS191 and SiS190 would be
  jumbo frame support. It will be implemented in near future.

git-svn-id: svn://svn.freebsd.org/base/stable/8@208203 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f