Cleanup: battery_precharge
Cleanup: battery_precharge

Just code cleanup; no functional changes.

BUG=chrome-os-partner:15579
BRANCH=none
TEST=code compiles

Change-Id: I9610b7df4b6c621d0a1d5ca0513629ee21626ec4
Signed-off-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/36364

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