Added NFC compile flag

Cargo.toml

@@ -28,6 +28,7 @@ ram_storage = []
 verbose = ["debug_ctap", "libtock_drivers/verbose_usb"]
 with_ctap1 = ["crypto/with_ctap1"]
 with_ctap2_1 = []
+with_nfc = []
 
 [dev-dependencies]
 elf2tab = "0.6.0"

deploy.py

@@ -846,6 +846,13 @@ if __name__ == "__main__":
       help=("Compiles the OpenSK application with backward compatible "
             "support for CTAP2.1 protocol."),
   )
+  main_parser.add_argument(
+      "--nfc",
+      action="append_const",
+      const="with_nfc",
+      dest="features",
+      help=("Compiles the OpenSK application with support for nfc."),
+  )
   main_parser.add_argument(
       "--regen-keys",
       action="store_true",