xfs: move xfs_ino_geometry to xfs_shared.h

The inode geometry structure isn't related to ondisk format; it's
support for the mount structure.  Move it to xfs_shared.h.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index be8afa1..e860114 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -22,6 +22,7 @@
 #include <linux/backing-dev.h>
 #include <linux/freezer.h>
 
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"