Revert "power: qpnp-qg: Use both charge & discharge tables for PON SOC"

This reverts commit fb26eef34d31c2f11dff26cc44e9133148a7d9dc. This change
is not required due to an update in the userspace logic.

Change-Id: Ib67174b8cf9f42f71840fc4d9bdf63c17172de02
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>