Revert "usb: dwc2: Update Kconfig to support dual-role"

This reverts commit e006fee6.

This patch causes build break. Modifications in Makefile and Kconfig have
no connection with driver code.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>