xfs: clean up code layout in xfs_trans_ail.c
xfs: clean up code layout in xfs_trans_ail.c

This patch rearranges the location of functions in xfs_trans_ail.c
to remove the need for forward declarations of those functions in
preparation for adding new functions without the need for forward
declarations.

Signed-off-by: Dave Chinner <4d9e23a041ac966f5316a7481300d4ae12e806fe@redhat.com>
Reviewed-by: Alex Elder <f556392d917047d964350b9c68912016c96d5e94@sgi.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs