xfs_io: refactor inode command

xfs_io: refactor inode command

The inode_f function is a bit convoluted; the default
find-last-inode case appears at the end, there are several return
points, we print the same basic information using 2 different
variables in 2 different locations depending on the mode we're in,
the "inode not found" was a printf & exit in the middle of the
function, etc.

Move the default case up to the top so it's more obvious, not
buried.

Make a new var, result_ino, which holds whatever we want to print
regardless of the mode, and then handle all the output at the end.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>