The most notable feature of USB OTG is support for a
"Dual-Role" device, which can act as either a device
or a host. The initial role choice can be changed
later, when two dual-role devices talk to each other.

At this writing, the OTG support in this driver is incomplete,
omitting the mandatory HNP or SRP protocols. However, some
of the cable based role switching works. (That is, grounding
the ID pin switches the controller to host mode, while leaving
it floating leaves it in peripheral mode.)

Select this if your system has a Mini-AB connector, or
to simplify certain kinds of configuration.

To implement your OTG Targeted Peripherals List (TPL), enable
USB_OTG_WHITELIST and update "drivers/usb/core/otg_whitelist.h"
to match your requirements.