power: qpnp-smbcharger: Force input current limiting during pulsing

Force input current limit to 300mA during QC3.0 DP/DM pulsing for PMI8950.
While at it, update the error handling during pulsing to force 9V QC2.0
in case of failure.

CRs-Fixed: 984187
Change-Id: I7d48ff9fb4505dae1ed231691ba8efcd845df27c
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>