scsi: aacraid: struct aac_ciss_phys_luns_resp: Replace 1-element array with flexible array

Replace the deprecated[1] use of a 1-element array in struct
aac_ciss_phys_luns_resp with a modern flexible array.

No binary differences are present after this conversion.

Link: KSPP#79 [1]
Signed-off-by: Kees Cook <kees@kernel.org>
Link: https://lore.kernel.org/r/20240711175055.work.928-kees@kernel.org
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: kees

drivers/scsi/aacraid/aachba.c

@@ -1833,7 +1833,7 @@ static int aac_get_safw_ciss_luns(struct aac_dev *dev)
 	struct aac_ciss_phys_luns_resp *phys_luns;
 
 	datasize = sizeof(struct aac_ciss_phys_luns_resp) +
-		(AAC_MAX_TARGETS - 1) * sizeof(struct _ciss_lun);
+		AAC_MAX_TARGETS * sizeof(struct _ciss_lun);
 	phys_luns = kmalloc(datasize, GFP_KERNEL);
 	if (phys_luns == NULL)
 		goto out;

drivers/scsi/aacraid/aacraid.h

@@ -322,7 +322,7 @@ struct aac_ciss_phys_luns_resp {
 		u8	level3[2];
 		u8	level2[2];
 		u8	node_ident[16];	/* phys. node identifier */
-	} lun[1];			/* List of phys. devices */
+	} lun[];			/* List of phys. devices */
 };
 
 /*