Now that the necessary infrastructure is in place to ensure hhook points which

register after a khelp module will get hooked, move khelp module initialisation
to the earlier SI_SUB_KLD stage.

MFC after:	1 week

sys/sys/module_khelp.h

@@ -85,8 +85,7 @@ struct khelp_modevent_data {
 		.evhand = khelp_modevent,				\
 		.priv = &kmd_##hname					\
 	};								\
-	DECLARE_MODULE(hname, h_##hname, SI_SUB_PROTO_IFATTACHDOMAIN,	\
-	    SI_ORDER_ANY);						\
+	DECLARE_MODULE(hname, h_##hname, SI_SUB_KLD, SI_ORDER_ANY);	\
 	MODULE_VERSION(hname, version)
 
 #define	KHELP_DECLARE_MOD(hname, hdata, hhooks, version)		\