Revert "gimble: configure PPVAR_SYS"
Revert "gimble: configure PPVAR_SYS"

This reverts commit 9c379fca35116534de74aceec99a50d106f947e2.

Reason for revert: <This will let battery charging keep at 0.4A, power team is checking on it. Before that, I think we need to revert this change.>

Original change's description:
> gimble: configure PPVAR_SYS
>
> The PPVAR_SYS must same as battery voltage(3 cells * 4.4V)
>
> BUG=b:196184163
> BRANCH=none
> TEST=make -j BOARD=gimble
>
> Signed-off-by: Scott Chao <8cefa9751fac9aaa897ba1213763a96ba8dbd20d@wistron.corp-partner.google.com>
> Change-Id: Ibc0c9104fba00f33ab2168b78455ca809a746643
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3088964
> Reviewed-by: caveh jalali <caveh@chromium.org>

Bug: b:196184163
Change-Id: I98042c503316ba1c91e16f4403471ad761f88818
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3093346
Auto-Submit: Scott Chao <8cefa9751fac9aaa897ba1213763a96ba8dbd20d@wistron.corp-partner.google.com>
Commit-Queue: Rubber Stamper <d516c4cc2192058ab8dae3d306acbdaf2ce6574f@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <d516c4cc2192058ab8dae3d306acbdaf2ce6574f@appspot.gserviceaccount.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec