iwlwifi/iwl-drv.c: fix typo defualt -> default

trivial, but this is user visible b/c it is in the help text
Signed-off-by: Toralf Förster <toralf.foerster@gmx.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/iwl-drv.c

@@ -1363,7 +1363,7 @@ MODULE_PARM_DESC(fw_restart, "restart firmware in case of error (default true)")
 module_param_named(antenna_coupling, iwlwifi_mod_params.ant_coupling,
 		   int, S_IRUGO);
 MODULE_PARM_DESC(antenna_coupling,
-		 "specify antenna coupling in dB (defualt: 0 dB)");
+		 "specify antenna coupling in dB (default: 0 dB)");
 
 module_param_named(wd_disable, iwlwifi_mod_params.wd_disable, int, S_IRUGO);
 MODULE_PARM_DESC(wd_disable,