ANDROID: GKI: usb: dwc3: Add USB_DR_MODE_DRD as dual role mode

dwc_usb31 supports DRD only mode. It does not support
USB OTG mode. SNPS core consultant parameter DWC_USB3_EN_OTG
is not set for dwc_usb31. Hence add USB_DR_MODE_DRD which
reflects support for host and device mode support without
supporting USB OTG features.

Bug: 150901210
Test: make

Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Change-Id: If3b683d4d47f0eb846a2ac302aff8848096395b9
(cherry picked from commit d4c4fb2d63ce1f2f7bf07975f71a5a0a4b2f5aec)
[hridya: commit amended to only include the ABI diff]
Signed-off-by: Hridya Valsaraju <hridya@google.com>