Sometimes it is desired for the USB device to detach and reattach itself
to the host. USB device controller driver interface supports detach with
usb_dc_detach() function. Subsequently the device can be reattached to
the bus by calling usb_dc_attach().
USB device stack sets the control transfer callbacks in usb_enable().
Nordic usb_dc_detach() implementation inadvertedly overwrote registered
callbacks with zeroes by clearing endpoint configuration structure. This
lead to a NULL pointer dereference during enumeration after device has
reattached inself to the host.
Preserve the callbacks by removing the eps_ctx_uninit() function.
Endpoints runtime data is initialized in usb_dc_attach() so this should
pose no problems.
Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
0d4aa49766