Odroid-XU3: adjust to support Tizen requirements

Odroid-XU3: adjust to support Tizen requirements

This patch includes changes required to boot Tizen,
by varoius authors:

arm: exynos5420: Adding support for board_usb_{init|cleanup}() functions
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
samsung: common: board: call dwc3_uboot_exit() for boards with DWC3
Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
config: Odroid-XU3: Support DFU download
Signed-off-by: Inha Song <ideal.song@samsung.com>
smdk5420: Add dfu_alt_info settings interface for support DFU download
Signed-off-by: Inha Song <ideal.song@samsung.com>
Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
config: Odroid-XU3: Enable dwc3 usb gadget
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
config: Odroid-XU3: Add default dfu device environment
Signed-off-by: Inha Song <ideal.song@samsung.com>
usb: config: odroid XU3: Enable UMS (Mass Storage) gadget
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Odroid-XU3: Enable check board signature when download bootloader
Signed-off-by: Inha Song <ideal.song@samsung.com>
odroid-xu3: config: add platform autoboot command
Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Odroid-XU3: Set rootfs device number to 0
Signed-off-by: Inha Song <ideal.song@samsung.com>