SOLARIS: Reorder definitions for vnode callbacks

SOLARIS: Reorder definitions for vnode callbacks

Currently, many of the functions for our vnode ops are
forward-declared, right before they are referenced in the relevant
vnop template array. Move the function definitions to before the
references, so we can simply get rid of the forward declarations.

These functions are also all only referenced in this file, so declare
them 'static'.

Reviewed-on: https://gerrit.openafs.org/12693
Reviewed-by: Mark Vitale <mvitale@sinenomine.net>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Marcio Brito Barbosa <mbarbosa@sinenomine.net>
Reviewed-by: Cheyenne Wills <cwills@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Tested-by: Mark Vitale <mvitale@sinenomine.net>
(cherry picked from commit 41a22dbf719629e0977fa963b3d19c6594d0d729)

Change-Id: I5840fef98d2ce15525c4981636fad6e5990cbad2
Reviewed-on: https://gerrit.openafs.org/13525
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Cheyenne Wills <cwills@sinenomine.net>
Reviewed-by: Mark Vitale <mvitale@sinenomine.net>
Reviewed-by: Marcio Brito Barbosa <mbarbosa@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>