exynos: Refactor the power_init code for exynos/max77686

This CL moves the power_init() function from within max77686.c to within the
exynos5/power.c file, as this init sequence is specific to the exynos5 and
not the max77686 part. This effectively allows other platforms to utilize the
max77686 with their own power_init() function which can have differing
settings.

BUG=chromium-os:30663
TEST=Manual, verify 'i2c md 9 14 1' still gives 38.
Verify U-Boot still comes up from SPI and boots kernel.

Change-Id: Ide2440c359c71cfe4fe0eefccd4bf444343bc3f7
Signed-off-by: Bernie Thompson <bhthompson@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/22292
Reviewed-by: Simon Glass <sjg@chromium.org>
3 files changed