fix changes

Author: bill88t

adafruit_wiznet5k/adafruit_wiznet5k.py

@@ -187,7 +187,7 @@ def __init__(
 
         # attempt to initialize the module
         self._ch_base_msb = 0
-        if self._w5100_init() != 1:
+        if self._w5xxx_init() != 1:
             raise RuntimeError("Failed to initialize WIZnet module.")
         # Set MAC address
         self.mac_address = mac