AA: mac80211: rtlwifi: Align private space in rtl_priv struct

Backport of r38346

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@38347 3c298f89-4303-0410-b956-a3cf2f4a3e73