usb: xhci: Add HCD_DMA flag to CI13612A USB driver

commit 35d0d76e from
https://github.com/axxia/linux-yocto.git v5.10/standard/axxia-dev/base.

As of commit 7b81cb6b

 ("usb: add a HCD_DMA flag instead of
guestimating DMA capabilities"), drivers have to set HCD_DMA
flag for the USB core to assume DMA is available.

Signed-off-by: John Jacques <john.jacques@intel.com>
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Signed-off-by: Liwei Song <liwei.song@windriver.com>