[Yaffs] mtd and yaffs2 updates for 2.4.25-vrs2-tcl1 kernel

[Nick Bane]

I have updated the tcl development kernel that can be browsed at 
http://husaberg.toby-churchill.com/cgi-bin/viewcvs.cgi/linux-2.4.25/trunk/

There are a few important changes for balloon generally.
This tree also represents a worked example for yaffs on a 2.4.x kernel 
with a 2k nand friendly mtd.
1) yaffs2 is incorporated and has a couple of fixes for 2.4 kernels 
added. The old yaffs1 code is still present but removed from the 
menuconfig as it is now redundant. The yaffs1/2 autodetection is also 
improved. This implements the very latest yaffs2 incl "Sergey's patch". 
Testing of this kernel looks very promising. A dropoff in yaffs2 that 
fails to cater for large amounts of nand due to temporarily needing more 
than 128k of indexes in scanbackwards (and therefore needing to use 
vmalloc not kmalloc via YMALLOC_ALT/YFREE_ALT) is fixed.
2) The mtd partition code is fixed to propagate oobinfo from masters to 
slaves. This may have been what was driving Wookey nuts recently.
3) In nand_scan, eccbytes is propagated from nand to mtd without which 
the ecc is all wrong after the first ecc block (256 bytes).

I have a bootldr that mirrors these changes if anyone is interested.

Note that this kernel is intended to service the TCL variant of the 
balloon2 board so references to samosa and the extra serial control 
lines won't be relevant to those using standard balloons without the 
relevant cpld image.

Nick Bane
cc yaffs list.