usb: gadget: dummy_hcd: add support for USB_DT_BOS on rh
usb: gadget: dummy_hcd: add support for USB_DT_BOS on rh

Without a reply for USB_DT_BOS the USB3 mode does not work since
448b6eb1 ("USB: Make sure to fetch the BOS desc for roothubs.).

Cc: 4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org #v3.5
Signed-off-by: Sebastian Andrzej Siewior <db043b2055cb3a47b2eb0b5aebf4e114a8c24a5a@breakpoint.cc>
Signed-off-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas