Add dwc2_gadget_set_ep0_desc_chain() function to switch between EP0 DDMA
chains depend on the stage of control transfer.

Include EP0 DDMA chain selection during ep_queue called from
dwc2_hsotg_enqueue_setup() for setup stage. Selecting and filling DDMA
chain for status phase as well - add calls of
dwc2_gadget_set_ep0_desc_chain() and
dwc2_gadget_config_nonisoc_xfer_ddma() functions.
Signed-off-by: NVahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: NJohn Youn <johnyoun@synopsys.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@linux.intel.com>