smb3: correct places where ENOTSUPP is used instead of preferred EOPNOTSUPP

checkpatch flagged a few places with:
     WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
Also fixed minor typo

Signed-off-by: Steve French <stfrench@microsoft.com>

Author: Steve French

fs/smb/client/inode.c

@@ -2680,7 +2680,7 @@ int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
 	}
 
 	cifsFileInfo_put(cfile);
-	return -ENOTSUPP;
+	return -EOPNOTSUPP;
 }
 
 int cifs_truncate_page(struct address_space *mapping, loff_t from)

fs/smb/client/smb2ops.c

@@ -297,7 +297,7 @@ smb2_adjust_credits(struct TCP_Server_Info *server,
 		cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 				credits->value, new_val);
 
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 	}
 
 	spin_lock(&server->req_lock);
@@ -1161,7 +1161,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 			/* Use a fudge factor of 256 bytes in case we collide
 			 * with a different set_EAs command.
 			 */
-			if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
+			if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
 			   MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
 			   used_len + ea_name_len + ea_value_len + 1) {
 				rc = -ENOSPC;
@@ -4591,7 +4591,7 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
 
 	if (shdr->Command != SMB2_READ) {
 		cifs_server_dbg(VFS, "only big read responses are supported\n");
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 	}
 
 	if (server->ops->is_session_expired &&