UPSTREAM: usb: dwc2: Add missing register field definitions

UPSTREAM: usb: dwc2: Add missing register field definitions

Added register field definitions, register names are according
DWC-OTG databook.

Change-Id: I4eb5aa7763760bb9c9ef9e0107250fe4015c8750
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
(cherry picked from commit 106528b21df7dd9da9ca3e5e4ff4e015c33211be)