wifi/espat, rtl8720dn, wifinina: move towards standard common interface for wifi adaptors

Signed-off-by: deadprogram <ron@hybridgroup.com>

rtl8720dn/wifidriver.go

@@ -0,0 +1,20 @@
+package rtl8720dn
+
+import (
+	"time"
+
+	"tinygo.org/x/drivers"
+)
+
+func (r *RTL8720DN) ConnectToAccessPoint(ssid, pass string, timeout time.Duration) error {
+	if len(ssid) == 0 {
+		return drivers.ErrWiFiMissingSSID
+	}
+
+	return r.ConnectToAP(ssid, pass)
+}
+
+func (r *RTL8720DN) Disconnect() error {
+	_, err := r.Rpc_wifi_disconnect()
+	return err
+}