staging: lustre: Fix sparse warnings for lnet/lnet/router.c

Fix the following sparse errors:
drivers/staging/lustre/lnet/lnet/router.c:756:1: warning: symbol 'lnet_wait_known_routerstate' was not declared. Should it be static?
drivers/staging/lustre/lnet/lnet/router.c:788:1: warning: symbol 'lnet_update_ni_status_locked' was not declared. Should it be static?
drivers/staging/lustre/lnet/lnet/router.c:828:1: warning: symbol 'lnet_destroy_rc_data' was not declared. Should it be static?
drivers/staging/lustre/lnet/lnet/router.c:848:16: warning: symbol 'lnet_create_rc_data_locked' was not declared. Should it be static?
drivers/staging/lustre/lnet/lnet/router.c:1228:1: warning: symbol 'lnet_destroy_rtrbuf' was not declared. Should it be static?
drivers/staging/lustre/lnet/lnet/router.c:1238:15: warning: symbol 'lnet_new_rtrbuf' was not declared. Should it be static?
drivers/staging/lustre/lnet/lnet/router.c:1274:1: warning: symbol 'lnet_rtrpool_free_bufs' was not declared. Should it be static?
drivers/staging/lustre/lnet/lnet/router.c:1303:1: warning: symbol 'lnet_rtrpool_alloc_bufs' was not declared. Should it be static?
drivers/staging/lustre/lnet/lnet/router.c:1337:1: warning: symbol 'lnet_rtrpool_init' was not declared. Should it be static?

Signed-off-by: Giedrius Statkevicius <giedriuswork@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>