Update mfrc522.py

Added LoPy and FiPy platform (same API)

Author: jr-k

mfrc522.py

@@ -23,11 +23,13 @@ def __init__(self, sck, mosi, miso, rst, cs):
 
 		self.rst.value(0)
 		self.cs.value(1)
+		
+		board = uname()[0]
 
-		if uname()[0] == 'WiPy':
+		if board == 'WiPy' || board == 'LoPy' || board == 'FiPy':
 			self.spi = SPI(0)
 			self.spi.init(SPI.MASTER, baudrate=1000000, pins=(self.sck, self.mosi, self.miso))
-		elif uname()[0] == 'esp8266':
+		elif board == 'esp8266':
 			self.spi = SPI(baudrate=100000, polarity=0, phase=0, sck=self.sck, mosi=self.mosi, miso=self.miso)
 			self.spi.init()
 		else: