ocpc: Use desired current from charger task
ocpc: Use desired current from charger task

OCPC was directly querying the desired battery current instead of
honoring the request from the charger task by mistake.  This commit
fixes that and makes sure that we don't set our current target from
the desired battery current directly.

BUG=b:180710082
BRANCH=dedede
TEST=Build and flash sasuke, charge from C1, verify that desired
charge profile is adhered to.

Signed-off-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@google.com>
Change-Id: I6d59babcad891fd09ab9a4fc5641e6d152223b74
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2740572
Tested-by: YongBeum.Ha <0375183cfb575c7cdd5cfe73f9fcd260a8810df7@samsung.corp-partner.google.com>
Reviewed-by: YongBeum.Ha <0375183cfb575c7cdd5cfe73f9fcd260a8810df7@samsung.corp-partner.google.com>
Reviewed-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Auto-Submit: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Commit-Queue: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>

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