media: cec.h: Fix kerneldoc

is_claiming_log_addrs documentation was missing.

fix this kernel-doc warning:
include/media/cec.h:296: warning: Function parameter or struct member 'is_claiming_log_addrs' not described in 'cec_adapter'

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>