LU-11453 misc: add compat for INIT_LIST_HEAD_RCU

LU-11453 misc: add compat for INIT_LIST_HEAD_RCU

Add a compat version of INIT_LIST_HEAD_RCU() if unavailable.

Fixes: 68bc3984975bb72f730d8a8ab7aa2d836e50abe5

Lustre-change: https://review.whamcloud.com/33875
Lustre-commit: 773e60669b53b0ca2fb48723a21dcddba592af9a

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I9c1296206e002b895bb6bdf55ddd0d8ec70cab07
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/35564
Tested-by: Maloo <maloo@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>