arm64: exynos: Enable Exynos PMU and PM domains drivers

Enable EXYNOS_PM_DOMAINS because recently Exynos5433 got support for
Power Management domains.  The Exynos5433 pinctrl driver requires
EXYNOS_PMU to get the syscon-regmap for PMU address space.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>