vfs: fs_parser: clean up kernel-doc warnings

vfs: fs_parser: clean up kernel-doc warnings

Fix kernel-doc notation function arguments to eliminate two kernel-doc
warnings:

  fs_parser.c:322: warning: Excess function parameter 'name' description in 'validate_constant_table'
  fs_parser.c:367: warning: Function parameter or member 'name' not described in 'fs_validate_description'

Link: https://lkml.kernel.org/r/20210407033743.9701-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>