ARM: dts: exynos: add USB DWC3 supplies to Chromebook Peach Pi

Add required voltage regulators for USB DWC3 block on Exynos5800
Chromebook Peach Pi board.  Due to lack of board schematics, use same
regulators as on Odroid XU board (using same MAX77802 PMIC).

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220123111644.25540-9-krzysztof.kozlowski@canonical.com