v4.19.13 snapshot.
diff --git a/drivers/media/usb/hackrf/Makefile b/drivers/media/usb/hackrf/Makefile
new file mode 100644
index 0000000..73064a2
--- /dev/null
+++ b/drivers/media/usb/hackrf/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_USB_HACKRF)              += hackrf.o