CHECKPATCH: 9P stuff (Protocol/9P, include/9p.h, MainNFSD/9p_*)

Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
9P: do not use LRU_REQ_INITIAL when manually calling cache_inode_lru_ref

Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>