qcacmn: Change log level for reg_is_fcc_regdmn

Change the log level to limit log output that is
similar as reg_is_etsi13_regdmn() did.

Change-Id: Iae797b4966cce4abae3c59572a9a8e815fe19a58
CRs-Fixed: 3352930

umac/regulatory/core/src/reg_services_common.c

@@ -6719,7 +6719,7 @@ bool reg_is_fcc_regdmn(struct wlan_objmgr_pdev *pdev)
 
 	status = reg_get_curr_regdomain(pdev, &cur_reg_dmn);
 	if (status != QDF_STATUS_SUCCESS) {
-		reg_err_rl("Failed to get reg domain");
+		reg_debug_rl("Failed to get reg domain");
 		return false;
 	}