nvme: add error log page slot definition

This patch adds the NVMe error slot definition from the spec.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

include/linux/nvme.h

@@ -1168,6 +1168,20 @@ struct nvme_command {
 	};
 };
 
+struct nvme_error_slot {
+	__le64		error_count;
+	__le16		sqid;
+	__le16		cmdid;
+	__le16		status_field;
+	__le16		param_error_location;
+	__le64		lba;
+	__le32		nsid;
+	__u8		vs;
+	__u8		resv[3];
+	__le64		cs;
+	__u8		resv2[24];
+};
+
 static inline bool nvme_is_write(struct nvme_command *cmd)
 {
 	/*