import missing libraries

Revision:
0:52c6206e8bde
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_lib.json	Mon Jul 12 13:24:25 2021 +0000
@@ -0,0 +1,17 @@
+{
+    "name": "sx1276-lora-driver",
+    "config": {
+        "spi-frequency": {
+            "help": "SPI frequency, Default: 8 MHz",
+            "value": 8000000
+        },
+        "buffer-size": {
+            "help": "Max. buffer size the radio can handle, Default: 255 B",
+            "value": 255
+        },
+        "radio-variant": {
+            "help": "Use to set the radio variant if the antenna switch input is not connected.",
+            "value": "SX1276UNDEFINED"
+        }
+    }
+}
\ No newline at end of file