cmake: forward HAVE_LIBUSB to HAVE_HIDAPI_LIBUSB

cmake/sdlchecks.cmake

@@ -1201,9 +1201,7 @@ macro(CheckHIDAPI)
       if(HIDAPI_ONLY_LIBUSB AND NOT HAVE_LIBUSB)
         set(HAVE_HIDAPI FALSE)
       endif()
-      if(NOT HAVE_LIBUSB)
-        set(HAVE_HIDAPI_LIBUSB FALSE)
-      endif()
+      set(HAVE_HIDAPI_LIBUSB ${HAVE_LIBUSB})
     endif()
 
     if(HAVE_HIDAPI)