usb: dwc3: use bus->sysdev for DMA configuration

The dma ops for dwc3 devices are not set properly. So, use a
physical device sysdev, which will be inherited from parent,
to set the hardware / firmware parameters like dma.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Tested-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Change-Id: I2ce49df970ae9b09714a780af4f97bbc4e5ba1bb
Git-commit: d64ff406e51e4f359afedbf2468a10440d6d8cef
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


[jackp@codeaurora.org: fixed conflicts and dropped dwc3-pci.c changes]
Signed-off-by: Jack Pham <jackp@codeaurora.org>