[CIFS] Change notify support part 2

Signed-off-by: Asser Ferno <asser@diku.dk>
Signed-off-by: Steve French <sfrench@us.ibm.com> and lightly modified
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 42c16cf3..026c88f 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -53,6 +53,7 @@
 #define SMB_COM_NT_TRANSACT           0xA0
 #define SMB_COM_NT_TRANSACT_SECONDARY 0xA1
 #define SMB_COM_NT_CREATE_ANDX        0xA2
+#define SMB_COM_NT_CANCEL             0xA4 /* no response */
 #define SMB_COM_NT_RENAME             0xA5 /* trivial response */
 
 /* Transact2 subcommand codes */