docs: kdoc_parser: handle struct member macro VIRTIO_DECLARE_FEATURES(name)

docs: kdoc_parser: handle struct member macro VIRTIO_DECLARE_FEATURES(name)

Parse the macro VIRTIO_DECLARE_FEATURES(name) and expand it to its
definition. These prevents one build warning:

WARNING: include/linux/virtio.h:188 struct member 'VIRTIO_DECLARE_FEATURES(features' not described in 'virtio_device'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <6f62e1f1210e74906fa50f4e937f66f54813661b.1772469446.git.mchehab+huawei@kernel.org>