arm64: dts: Add RTC and ADC dt node for exynos5433

arm64: dts: Add RTC and ADC dt node for exynos5433

This patch adds RTC (Real Time Clock) dt node for Exynos5433 SoC and
adds ADC dt node for Exynos5433 SoC. The commit c1b501564c98 ("iio:
adc: exynos_adc: Add support for exynos7") commit supports the ADC
for Exynos7. Exynos5433's ADC IP is the same with Exynos7's ADC IP.
Exynos5433 has a little different from ADCv2 on ADC_CON2 register.
Exynos5433 doesn't contain OSEL/ESEL /HIGHF of ADC_CON2.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>