input: qcom-hv-haptics: switch API to trigger PBS for ISC configuration

SW trigger for PBS to configure ISC in LRA detection doesn't need to
pass any parameter or wait on any condition including checking status.
Hence switch using qpnp_pbs_trigger_single_event() instead of
qpnp_pbs_trigger_event() to trigger PBS.

Change-Id: I8b252e293265994976924435f8a6a11d9b463119
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>