usb: xhci: Add helper APIs to return xhci dma addresses

Add APIs to get physical and mapped DMA addresses of
secondary event ring, transfer ring and device context
base addresses which are required to pass to remote entity.
The remote entity uses these addresses to in order to
program the xHC from its context.

This commit also squashes in the following change:

    usb: Add support to handle USB SMMU S1 address

Change-Id: Ie0756d646a396a11b41b93e886bca9aff636ee5d
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>