Samsung defconfig updates for v4.3

- for exynos_defconfig
  : enable SND_SOC_ODROIDX2 and SND_SIMPLE_CARD for
    Odroid-XU3 to use max98090 audio codec
  : enalbe SENSORS_NTC_THERMISTOR for Peach boards
  : enable cpufreq-dt driver with ONDEMAND governor
    for Exynos SoCs 3250, 4210, 4212, 4412 and 5250

- for multi_v7_defconfig:
  : remove SAMSUNG_USB2PHY and SAMSUNG_USB3PHY are not used now
  : enable SENSORS_NTC_THERMISTOR and EXYNOS_ADC for Peach boards
  : enable REGULATOR_MAX77802 for Peach boards
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