drm/lima/lima_drv: Demote kernel-doc formatting abuse

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/lima/lima_drv.c:264: warning: cannot understand function prototype: 'const struct drm_driver lima_drm_driver = '

Cc: Qiang Yu <yuq825@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Cc: lima@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201113134938.4004947-16-lee.jones@linaro.org