xfs: introduce a common helper xfs_icluster_size_fsb
xfs: introduce a common helper xfs_icluster_size_fsb

Introduce a common routine xfs_icluster_size_fsb() to calculate
and return the number of file system blocks per inode cluster.

Signed-off-by: Jie Liu <9edab3d8932dbb8f20eb55cd8199c20e7fb56c12@oracle.com>
Reviewed-by: Dave Chinner <4d9e23a041ac966f5316a7481300d4ae12e806fe@redhat.com>
Signed-off-by: Dave Chinner <aa743a0aaec8f7d7a1f01442503957f4d7a2d634@fromorbit.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs