Update mfrc522.py

Added LoPy and FiPy platform (same API)

mfrc522.py

@@ -24,10 +24,12 @@ class MFRC522:
 		self.rst.value(0)
 		self.cs.value(1)
 		
-		if uname()[0] == 'WiPy':
+		board = uname()[0]
+
+		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: