Fix wrong VT8235 flash enable failed warning

* Fix harmless but worrying warning where the return value of
  pci_write_byte is misinterpreted.
* Hash together VT8231 and VT8235 code into VT823x. VT8231 is the better
  implementation, but lacked the write protect disable code that's
  apparently needed for VT8235.

Corresponding to flashrom svn r93 and coreboot v2 svn r2568.

Signed-off-by: Luc Verhaegen <libv@skynet.be>
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
1 file changed