[usb] Drag in USB commands only when USB support is present

Signed-off-by: Michael Brown <mcb30@ipxe.org>
2 files changed
tree: 80823459d11dc40e70871a5f1016e9aecb6734f3
  1. .github/
  2. contrib/
  3. src/
  4. COPYING
  5. COPYING.GPLv2
  6. COPYING.UBDL
  7. README