ARM: dts: exynos: align OPP table names with DT schema

DT schema expects names of operating points tables to match certain
pattern:

  exynos5422-odroidxu3-lite.dtb: opp-table0: $nodename:0: 'opp-table0' does not match '^opp-table(-[a-z0-9]+)?$'

Link: https://lore.kernel.org/r/20230120064724.40621-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>