defconfig: msm: Enable dual-role driver to allow USB mode switch

dual_role_usb class framework allows userspace to perform role switch
between ufp and dfp by exposing sysfs attributes.

Change-Id: I5335f5d8c207fc06ac518d6cbf854e0b777ad124
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>