power: qpnp-smbcharger: increase parallel charger fcc

The parallel charger's VSYS is not connected on parallel charging
designs. All of the charge current flows through the CHGOUT to the
battery. However, if the primary charger is input current limited and
there is a large system load, then the parallel charger's current will
flow into the primary charger's CHGOUT. This will supplement the system
load instead of charging the battery.

This is a problem because all the current provided by the secondary
charger is fed through the batfet, and is sensed as charge current. The
amount of current provided to the battery is actually less than that
because the current is partially supplied to the system instead. This
results in the parallel charger not drawing enough current to charge the
battery even though there is plenty of current left before the input
current limit is hit.

Work around this issue by increasing the fast charge current on the
secondary charger and lowering it on the primary charger. This way, the
primary charger has more current to feed the system and the secondary
charger is less likely to be limited by the false charge current limit.

CRs-Fixed: 895883
Change-Id: I792ed9450bdac87d96b24707c1fb63fe93925b70
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>