Added extra RFID readers

Fork of RFID-RC522 by Thomas Kirchner

Revision:
3:654723104cc9
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Fri Jun 22 09:41:42 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#03196b244ee00fc748cd4dbfa83b26f3fc0f376b