[Yaffs] Optinins sought on change attribute times to 64 bits

Hi YAFFSers

AT present, YAFFS2 uses 64-bit times for WinCE and 32-bits for other stuff.

IMHO it would be best to use 64 bit for everything internally and use some
sort of fudge factor for 2.4 kernel.

Benefits:
1) Get the feature in OSs that support it.
2) Get rid of ugly #ifdef WINCE stuff in the code.

Unless there is a noise to the negative, I'll do this in two days or so.

-- CHarles