cns3xxx: switch to using the upstream dwc2 driver instead of dwc_otg

target/linux/cns3xxx/config-3.14

target/linux/cns3xxx/files/arch/arm/mach-cns3xxx/laguna.c

target/linux/cns3xxx/files/drivers/usb/dwc/Kconfig

target/linux/cns3xxx/files/drivers/usb/dwc/Makefile

target/linux/cns3xxx/files/drivers/usb/dwc/otg_attr.c

target/linux/cns3xxx/files/drivers/usb/dwc/otg_attr.h

target/linux/cns3xxx/files/drivers/usb/dwc/otg_cil.c

target/linux/cns3xxx/files/drivers/usb/dwc/otg_cil.h

target/linux/cns3xxx/files/drivers/usb/dwc/otg_cil_intr.c

target/linux/cns3xxx/files/drivers/usb/dwc/otg_driver.c

target/linux/cns3xxx/files/drivers/usb/dwc/otg_driver.h

target/linux/cns3xxx/files/drivers/usb/dwc/otg_hcd.c

target/linux/cns3xxx/files/drivers/usb/dwc/otg_hcd.h

target/linux/cns3xxx/files/drivers/usb/dwc/otg_hcd_intr.c

target/linux/cns3xxx/files/drivers/usb/dwc/otg_hcd_queue.c

target/linux/cns3xxx/files/drivers/usb/dwc/otg_pcd.c

target/linux/cns3xxx/files/drivers/usb/dwc/otg_pcd.h

target/linux/cns3xxx/files/drivers/usb/dwc/otg_pcd_intr.c

target/linux/cns3xxx/files/drivers/usb/dwc/otg_plat.h

target/linux/cns3xxx/files/drivers/usb/dwc/otg_regs.h