xfs: hoist AGI repair context to a heap object

Save ~460 bytes of stack space by moving all the repair context to a
heap object.  We're going to add even more context data in the next
patch, which is why we really need to do this now.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
1 file changed