Fixed NFC feature flag

Cargo.toml

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

third_party/libtock-drivers/Cargo.toml

@@ -14,3 +14,4 @@ libtock_core = { path = "../../third_party/libtock-rs/core" }
 [features]
 debug_ctap = []
 verbose_usb = ["debug_ctap"]
+with_nfc=[]

third_party/libtock-drivers/src/lib.rs

@@ -3,6 +3,7 @@
 pub mod buttons;
 pub mod console;
 pub mod led;
+#[cfg(feature = "with_nfc")]
 pub mod nfc;
 pub mod result;
 pub mod rng;