v4l2: split module stuff and common access/demux video stuff

modules/access/Modules.am

@@ -158,6 +158,7 @@ libaccess_shm_plugin_la_DEPENDENCIES =
 libvlc_LTLIBRARIES += $(LTLIBaccess_shm)
 
 libv4l2_plugin_la_SOURCES = \
+	v4l2/v4l2.c \
 	v4l2/video.c \
 	v4l2/demux.c \
 	v4l2/access.c \

modules/access/v4l2/v4l2.h

@@ -77,8 +77,11 @@ struct buffer_t
     size_t  length;
 };
 
-/* video.c */
+/* v4l2.c */
 void ParseMRL(vlc_object_t *, const char *);
+v4l2_std_id var_InheritStandard (vlc_object_t *, const char *);
+
+/* video.c */
 int SetupInput (vlc_object_t *, int fd);
 int SetupFormat (vlc_object_t *, int, uint32_t,
                  struct v4l2_format *, struct v4l2_streamparm *);