input: misc: qcom-hv-haptics: Add support to play custom waveform

Custom waveform with FIFO data samples and play rate setting would
be passed down from userspace through custom_data memory in periodic
effect data structure. Load the waveform into FIFO memory and play
it using FIFO mode.

Meanwhile, correct a typo in F_16KHZ definition.

Change-Id: I26b78df809efbe398c91c89394152caebafbe1b6
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>