mei: hw: don't use one element arrays

Replace the single element arrays with a simple value type u8 reserved,
even thought is is not used for dynamically sized trailing elements
it confuses the effort of replacing one-element arrays with
flexible arrays for that purpose.

Link: https://github.com/KSPP/linux/issues/79
Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: NGustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200723145927.882743-7-tomas.winkler@intel.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/hw.h

 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * Copyright (c) 2003-2018, Intel Corporation. All rights reserved
+ * Copyright (c) 2003-2020, Intel Corporation. All rights reserved
  * Intel Management Engine Interface (Intel MEI) Linux driver
  */
 
@@ -319,7 +319,7 @@ struct hbm_props_response {
 	u8 hbm_cmd;
 	u8 me_addr;
 	u8 status;
-	u8 reserved[1];
+	u8 reserved;
 	struct mei_client_properties client_properties;
 } __packed;
 
@@ -352,7 +352,7 @@ struct hbm_add_client_response {
 	u8 hbm_cmd;
 	u8 me_addr;
 	u8 status;
-	u8 reserved[1];
+	u8 reserved;
 } __packed;
 
 /**
@@ -461,7 +461,7 @@ struct hbm_notification {
 	u8 hbm_cmd;
 	u8 me_addr;
 	u8 host_addr;
-	u8 reserved[1];
+	u8 reserved;
 } __packed;
 
 /**