Fix TX/RX buffers to align them with USB buffers and avoid overflows.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/hsm/sc_hsm.h

@@ -32,6 +32,9 @@
 #include "file.h"
 #include "apdu.h"
 #include "pico_keys.h"
+#include "usb.h"
+
+#define MAX_APDU_DATA (USB_BUFFER_SIZE - 20)
 
 extern const uint8_t sc_hsm_aid[];