state: Convert all bufs to void * ...

A void * is a much better type for a buffer than a u8 * as it
can be casted to any other type implicitly. Convert all buffers
used by the state framework to void *.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: drop lazy_init ...

lazy_init is an optimization that makes it possible to read only up to
the first valid bucket when starting. However, when restoring consistency,
immediately afterwards we have we have to initialize all buckets anyway,
so being lazy doesn't give us any gain. Remove it to simplify the code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: bucket_cached: Fix reading pages which need cleanup ...

When the raw device returns -EUCLEAN we have to return
successfully to the upper layer, otherwise it will discard the
data.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Update barebox-state ...

Fixed direct bucket

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>