poppy/soraka: Enable VR decay for runtime and suspend S0ix
poppy/soraka: Enable VR decay for runtime and suspend S0ix

We have been using upstart script to force VR decay in runtime S0ix
for a while now and haven't seen any issues. This change pushes the
fix in EC so that we don't need the upstart script hack any more.

BUG=b:70881268
BRANCH=None
TEST=Verified by reverting upstart script that PMIC registers are
programmed as required to enable VR decay in S0 and S0ix.

Change-Id: I19729e907d2ae065758e69933d0b1d3e5b43d5e0
Signed-off-by: Furquan Shaikh <6be5c96c464778f89679b1062a2e0a6af93d2aa5@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/856856
Reviewed-by: Aaron Durbin <af0622ab041e8b0f8e5819838dcc93898196e71f@chromium.org>

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