Move locks API users to locks_lock_inode_wait()

Instead of having users check for FL_POSIX or FL_FLOCK to call the correct
locks API function, use the check within locks_lock_inode_wait().  This
allows for some later cleanup.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 693b903..ce64a45 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5472,18 +5472,7 @@
 
 static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
 {
-	int res = 0;
-	switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
-		case FL_POSIX:
-			res = posix_lock_inode_wait(inode, fl);
-			break;
-		case FL_FLOCK:
-			res = flock_lock_inode_wait(inode, fl);
-			break;
-		default:
-			BUG();
-	}
-	return res;
+	return locks_lock_inode_wait(inode, fl);
 }
 
 struct nfs4_unlockdata {