Modified board name to PXA988 from PXA986, made a few other modifications

I have removed some of the logic I was trying to use to copy kernel modules
back and forth -- I don't think the recovery needs those, although the
stock recovery has them. Nothing in the porting intro for cyanogenmod
implies that I need to have kernel modules for recovery. Actual usage may,
of course, be different.

Change-Id: Ia68ad5bae4075bea6ea0bab2797ebefdcbfe7a56