libceph: Fix sparse warning

Make ceph_monc_do_poolop() static to remove the following sparse warning:
 * net/ceph/mon_client.c:616:5: warning: symbol 'ceph_monc_do_poolop' was not
   declared. Should it be static?
Also drops the 'ceph_monc_' prefix, now being a private function.

Signed-off-by: Iulius Curt <icurt@ixiacom.com>
Signed-off-by: Sage Weil <sage@inktank.com>
diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
index e98f607..812eb3b 100644
--- a/net/ceph/mon_client.c
+++ b/net/ceph/mon_client.c
@@ -637,7 +637,7 @@
 /*
  * Do a synchronous pool op.
  */
-int ceph_monc_do_poolop(struct ceph_mon_client *monc, u32 op,
+static int do_poolop(struct ceph_mon_client *monc, u32 op,
 			u32 pool, u64 snapid,
 			char *buf, int len)
 {
@@ -687,7 +687,7 @@
 int ceph_monc_create_snapid(struct ceph_mon_client *monc,
 			    u32 pool, u64 *snapid)
 {
-	return ceph_monc_do_poolop(monc,  POOL_OP_CREATE_UNMANAGED_SNAP,
+	return do_poolop(monc,  POOL_OP_CREATE_UNMANAGED_SNAP,
 				   pool, 0, (char *)snapid, sizeof(*snapid));
 
 }
@@ -696,7 +696,7 @@
 int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
 			    u32 pool, u64 snapid)
 {
-	return ceph_monc_do_poolop(monc,  POOL_OP_CREATE_UNMANAGED_SNAP,
+	return do_poolop(monc,  POOL_OP_CREATE_UNMANAGED_SNAP,
 				   pool, snapid, 0, 0);
 
 }