cifs: fix up CIFSSMBEcho for unaligned access

Make sure that CIFSSMBEcho can handle unaligned fields. Also fix a minor
bug that causes this warning:

fs/cifs/cifssmb.c: In function 'CIFSSMBEcho':
fs/cifs/cifssmb.c:740: warning: large integer implicitly truncated to unsigned type

...WordCount is u8, not __le16, so no need to convert it.

This patch should apply cleanly on top of the rest of the patchset to
clean up unaligned access.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/cifssmb.c

@@ -733,9 +733,9 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
 
 	/* set up echo request */
 	smb->hdr.Tid = cpu_to_le16(0xffff);
-	smb->hdr.WordCount = cpu_to_le16(1);
-	smb->EchoCount = cpu_to_le16(1);
-	smb->ByteCount = cpu_to_le16(1);
+	smb->hdr.WordCount = 1;
+	put_unaligned_le16(1, &smb->EchoCount);
+	put_bcc_le(1, &smb->hdr);
 	smb->Data[0] = 'a';
 	smb->hdr.smb_buf_length += 3;