implement CEMU_USB_MSGT_DT_GET_STATUS

card_emu can now report its current satus upon request.
diff --git a/firmware/src_simtrace/cardemu_prot.h b/firmware/src_simtrace/cardemu_prot.h
index 1a8c213..8b781bc 100644
--- a/firmware/src_simtrace/cardemu_prot.h
+++ b/firmware/src_simtrace/cardemu_prot.h
@@ -92,6 +92,7 @@
 #define CEMU_STATUS_F_CLK_ACTIVE	0x00000002
 #define CEMU_STATUS_F_RCEMU_ACTIVE	0x00000004
 #define CEMU_STATUS_F_CARD_INSERT	0x00000008
+#define CEMU_STATUS_F_RESET_ACTIVE	0x00000010
 
 /* CEMU_USB_MSGT_DO_STATUS */
 struct cardemu_usb_msg_status {