fastcharge: initial GT9505 adaptation

Change-Id: I8fde4ccc062a8ae049abe0dedc25e1d099c27e04
Signed-off-by: Paul Reioux <reioux@gmail.com>
defconfig: enable FORCE_FAST_CHARGE

Change-Id: If4c48863dc939da8b54614ada1e59018a39f8a2b