staging: wilc1000: remove unused marco related to HIF commands

After removing the multiplexing of hif commands in hif_if_work()
macros prefix with 'HOST_IF_MSG_' are not required. Also 'id' field in
host_if_msg is not required anymore.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>