ARM: dts: exynos: drop unsupported MAX77802 regulators on Odroid XU

The numbering of regulators is not continuous and the MAX77802 does not
support regulators LDO16, LDO22 and LDO31.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211228164305.35877-2-krzysztof.kozlowski@canonical.com