[PATCH] suspend-to-disk: cleanup printks(), rearrange reading

[PATCH] suspend-to-disk: cleanup printks(), rearrange reading

I'd like Florent credited -- he is maintaining 2.4.X version and
helping with development. Kill warnings by rearranging code / adding
prototypes. Enable using separate console (so user sees progress and X
suspend/resume works properly), forward-port of updates from Florent
and stop using own PRINTK stuff (mostly). Reading now primarily uses
block_device(), this should enable more cleanups. Fixed double free on
error path.