freebsd: Assume all devices on FreeBSD are USB 2.0 per default because

FreeBSD does not have sysfs to read the device speed and type properly.
The good thing is that there are no PCI devices that support V4L right
now so all supported devices are from webcamd which only supports USB
devices so that default is always correct.

src/main.c

@@ -946,8 +946,13 @@ get_device_connection(const char *dev)
   snprintf(path, sizeof(path),  "/sys/class/%s/device/speed", dev);
 
   if(readlinefromfile(path, l, sizeof(l))) {
+#if defined(PLATFORM_FREEBSD)
+    // Assume USB 2.0 on FreeBSD because there are no supported PCI devices
+    return HOSTCONNECTION_USB480;
+#else
     // Unable to read speed, assume it's PCI
     return HOSTCONNECTION_PCI;
+#endif
   } else {
     speed = atoi(l);