(fw) Enable FW mode at start.

FW mode must now be explicitlty enabled. App mode will be
     automatically enabled when jumping to the start of the loaded
     application.

Signed-off-by: Joachim Strömbergson <joachim@assured.se>

hw/application_fpga/fw/tk1/main.c

@@ -342,9 +342,6 @@ static void run(const struct context *ctx)
 #endif
 	// clang-format on
 
-	// Flip over to application mode
-	*switch_app = 1;
-
 	// XXX Firmware stack now no longer available
 	// Don't use any function calls!
 
@@ -399,6 +396,9 @@ int main(void)
 	uint8_t cmd[CMDLEN_MAXBYTES] = {0};
 	enum state state = FW_STATE_INITIAL;
 
+	// Enable FW mode.
+	*switch_app = 0;
+
 	print_hw_version();
 
 	// Let the app know the function adddress for blake2s()