btrfs-progs: check: Also check and repair unaligned/mismatch device and super sizes

btrfs-progs: check: Also check and repair unaligned/mismatch device and super sizes

Along with the rescue introduced, also introduce check and repair for them.

Unlike normal check functions, some of the check is optional, and even if
the image failed to pass optional check, kernel can still runs fine.
(But may cause noisy kernel warning)

So some check, mainly for alignment, will not cause btrfs check to fail,
but only to output warning and instructs how to fix it.

For repair, it just calls the same repair function in rescue, and is
included in 'btrfs check --repair'.
But 'btrfs rescue' is still the preferred method, since it can be used
independent of all the 'check' passes, if we know what's the exact
problem to fix.

Signed-off-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>