net: sparx5: add *sparx5 argument to a few functions

The *sparx5 context pointer is required in functions that need to access
platform constants (which will be added in a subsequent patch).  Prepare
for this by updating the prototype and use of such functions.

Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>