drivers/dht/dht.py: Change default import module as machine.

Signed-off-by: Takeo Takahashi <takeo.takahashi.xv@renesas.com>

drivers/dht/dht.py

@@ -9,8 +9,10 @@
     from mimxrt import dht_readinto
 elif sys.platform == "rp2":
     from rp2 import dht_readinto
-else:
+elif sys.platform == "pyboard":
     from pyb import dht_readinto
+else:
+    from machine import dht_readinto
 
 
 class DHTBase: