batman-adv: Fix order of kernel doc in batadv_priv

During the inlining process of kerneldoc in commit 8b84cc4f
("batman-adv: Use inline kernel-doc for enum/struct"), some comments were
placed at the wrong struct members. Fixing this by reordering the comments.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>