GFS2: fix code parameter error in inode_go_lock

In inode_go_lock() function, the parameter order of list_add() is error.
According to the define of list_add(), the first parameter is new entry
and the second is the list head, so ip->i_trunc_list should be the
first parameter and the sdp->sd_trunc_list should be second.

Signed-off-by: Wang <Xibo&lt;wang.xibo@zte.com.cn>
Signed-off-by: Xiao <Likun&lt;xiao.likun@zte.com.cn>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>