ARM: dts: exynos: Fix charging regulator voltage and current for I9100

ARM: dts: exynos: Fix charging regulator voltage and current for I9100

Set CHARGER current and CHARGER_CV voltage according to Galaxy S2 Epic
4G Touch SPH-D710 Android vendor sources [0,1].

Remove regulator-always-on. The regulator can be enabled and disabled
based on extcon events.

[0] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/power/max8997_charger_u1.c#L169-L170
[1] https://github.com/krzk/linux-vendor-backup/blob/samsung/galaxy-s2-epic-4g-touch-sph-d710-exynos4210-dump/drivers/power/max8997_charger_u1.c#L390-L391

Signed-off-by: Timon Baetz <timon.baetz@protonmail.com>
Link: https://lore.kernel.org/r/20201230205139.1812366-7-timon.baetz@protonmail.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>