ice: add a function comment for ice_cfg_mac_antispoof

This function definition was missing a comment describing its
implementation. Add one.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice_vf_lib.c

@@ -657,6 +657,13 @@ struct ice_port_info *ice_vf_get_port_info(struct ice_vf *vf)
 	return vf->pf->hw.port_info;
 }
 
+/**
+ * ice_cfg_mac_antispoof - Configure MAC antispoof checking behavior
+ * @vsi: the VSI to configure
+ * @enable: whether to enable or disable the spoof checking
+ *
+ * Configure a VSI to enable (or disable) spoof checking behavior.
+ */
 static int ice_cfg_mac_antispoof(struct ice_vsi *vsi, bool enable)
 {
 	struct ice_vsi_ctx *ctx;