docs: kdoc_parser: move var transformers to the beginning

docs: kdoc_parser: move var transformers to the beginning

Just like functions and structs had their transform variables
placed at the beginning, move variable transforms to there
as well.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <491b290252a308f381f88353a3bbe9e2bd1f6a62.1772469446.git.mchehab+huawei@kernel.org>