The syntax without dots is available since commit 43756e34
("scripts/kernel-doc: Add support for named variable macro arguments").

The same HTML output is produced with and without this patch.
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210101211818.1023919-1-j.neuschaefer@gmx.net