mlx5: Update DEVX man pages to describe the EREMOTEIO return code

When a DEVX command is executed by FW and failed, EREMOTEIO is returned
to indicate the caller that the command status and syndrome are
available in the outbox.

Add this info to the DEVX man pages.

Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Reviewed-by: Avihai Horon <avihaih@nvidia.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>

providers/mlx5/man/mlx5dv_devx_create_eq.3.md

@@ -74,6 +74,8 @@ On error NULL will be returned and errno will be set.
 
 Upon success *mlx5dv_devx_destroy_eq* will return 0, on error errno will be returned.
 
+If the error value is EREMOTEIO, outbox.status and outbox.syndrome will contain the command failure details.
+
 # SEE ALSO
 
 *mlx5dv_devx_alloc_msi_vector(3)*, *mlx5dv_devx_query_eqn(3)*

providers/mlx5/man/mlx5dv_devx_obj_create.3.md

@@ -118,6 +118,8 @@ mlx5dv_devx_obj* on error NULL will be returned and errno will be set.
 
 Upon success query, modify, destroy, general commands, 0 is returned or the value of errno on a failure.
 
+If the error value is EREMOTEIO, outbox.status and outbox.syndrome will contain the command failure details.
+
 # SEE ALSO
 
 **mlx5dv_open_device**, **mlx5dv_devx_create_cmd_comp**, **mlx5dv_devx_get_async_cmd_comp**

providers/mlx5/man/mlx5dv_devx_qp_modify.3.md

@@ -90,6 +90,8 @@ object via DEVX (e.g. mlx5dv_devx_qp_modify).
 
 Upon success 0 is returned or the value of errno on a failure.
 
+If the error value is EREMOTEIO, outbox.status outbox.syndrome will contain the command failure details.
+
 # SEE ALSO
 
 **mlx5dv_open_device**, **mlx5dv_devx_obj_create**