daisy: Clean up pmu initialization
daisy: Clean up pmu initialization

CG_CTRL0 is already set to 2 by pmu_init_registers(), and the battery
charge rate hack was temporary.

BUG=chrome-os-partner:23425
BRANCH=none
TEST=build daisy

Change-Id: I863c8d6d5d5f30375dce14b7d2a30e9e710ef969
Signed-off-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/173915
Reviewed-by: Jeremy Thorpe <11b09af857faea4e83675a9aa3d217c259890365@chromium.org>

mtk09422/chromiumos-platform-ec,thehobn/ec,akappy7/ChromeOS_EC_LED_Diagnostics,md5555/ec,eatbyte/chromium-ec,coreboot/chrome-ec,longsleep/ec,fourier49/BIZ_EC,alterapraxisptyltd/chromium-ec,md5555/ec,thehobn/ec,fourier49/BZ_DEV_EC,fourier49/BIZ_EC,coreboot/chrome-ec,gelraen/cros-ec,eatbyte/chromium-ec,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,fourier49/BIZ_EC,alterapraxisptyltd/chromium-ec,eatbyte/chromium-ec,coreboot/chrome-ec,fourier49/BZ_DEV_EC,mtk09422/chromiumos-platform-ec,mtk09422/chromiumos-platform-ec,longsleep/ec,gelraen/cros-ec,longsleep/ec,thehobn/ec,alterapraxisptyltd/chromium-ec,longsleep/ec,akappy7/ChromeOS_EC_LED_Diagnostics,alterapraxisptyltd/chromium-ec,md5555/ec,md5555/ec,fourier49/BZ_DEV_EC,fourier49/BZ_DEV_EC,thehobn/ec,eatbyte/chromium-ec,coreboot/chrome-ec,gelraen/cros-ec,gelraen/cros-ec,mtk09422/chromiumos-platform-ec,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,fourier49/BIZ_EC