Btrfs: check inconsistence between chunk and block group

Btrfs: check inconsistence between chunk and block group

With btrfs-corrupt-block, one can drop one chunk item and mounting
will end up with a panic in btrfs_full_stripe_len().

This doesn't not remove the BUG_ON, but instead checks it a bit
earlier when we find the block group item.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
(cherry picked from commit 522a8ff26e193be9151dd22bdf1f46c7759cd637)
(cherry picked from commit 580107319b95d386946fbf1fb6d1ed5cbe1a810e)