adb: Add Broadcom ADB ioctl support

Needed for bcm21553 kernels using non-standard adb usb gadget that
expects an ioctl sent in order to enable adb.

Code can be seen in kernel/drivers/usb/gadget_brcm/android.c.

Change-Id: I182a4ca2898cc01d541b04ee458b443fa61053f0