Incomplete YAFFS2 update

[sleavitt]

The update of YAFFS2 from December 13, 2010, appears to be incomplete, as it is not possible to pull this github repo, pull /proc/config.gz from an Incredible running this kernel, and use it to compile a kernel without getting compiler error warnings, specifically complaining about the Makefile having no rule to make yaffs_vfs_glue.o. It appears that the code in the github repo may not be completely committed as it relates to YAFFS2. Thanks.