battery/max17055: Specify desired charging voltage/current
battery/max17055: Specify desired charging voltage/current

BUG=b:64821815, b:63870414
CQ-DEPEND=CL:621777
BRANCH=none
TEST=plug in AC, and check 'charger' command on ec console

Change-Id: Ic60bcab7fd0ccc2ea73471ac46e9b0b887f251d9
Signed-off-by: Philip Chen <3ee404f9ef892bc3fda6e6a76e65843b5fa44db2@google.com>
Reviewed-on: https://chromium-review.googlesource.com/621776
Commit-Ready: Philip Chen <3ee404f9ef892bc3fda6e6a76e65843b5fa44db2@chromium.org>
Tested-by: Philip Chen <3ee404f9ef892bc3fda6e6a76e65843b5fa44db2@chromium.org>
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>

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