[PATCH] Chip definition for W29C512A/W29EE512

[Urja Rannikko]

Mine was a Winbond W29EE512P-70 (PLCC32, 5V)
found in an RTL8169 network card.
I was about to backup the chip when i found out flashrom didnt know of it.

The ID for the chip was already in flashchips.h with the name W29C512A
and a note for "also W29EE512". I'm assuming they're compatible.

Attached are patch for the flashchips.c entry and a write log for 64k
random data (proving it is PREW by me as in the patch).
I also successfully wrote the original data back into the chip.