scsi: ipr: Replace 1-element arrays with flexible arrays

Replace the deprecated[1] use of a 1-element arrays in struct
ipr_hostrcb_fabric_desc and struct ipr_hostrcb64_fabric_desc with modern
flexible arrays.

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/20240711180702.work.536-kees@kernel.org
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: kees

drivers/scsi/ipr.h

@@ -1030,7 +1030,7 @@ struct ipr_hostrcb_fabric_desc {
 #define IPR_PATH_FAILED			0x03
 
 	__be16 num_entries;
-	struct ipr_hostrcb_config_element elem[1];
+	struct ipr_hostrcb_config_element elem[];
 }__attribute__((packed, aligned (4)));
 
 struct ipr_hostrcb64_fabric_desc {
@@ -1044,7 +1044,7 @@ struct ipr_hostrcb64_fabric_desc {
 	u8 res_path[8];
 	u8 reserved3[6];
 	__be16 num_entries;
-	struct ipr_hostrcb64_config_element elem[1];
+	struct ipr_hostrcb64_config_element elem[];
 }__attribute__((packed, aligned (8)));
 
 #define for_each_hrrq(hrrq, ioa_cfg) \