input: qcom-hv-haptics: limit play rate for PM8350B v1 hardware

Due to a hardware limitation, PM8350B v1 cannot play more than 8 KHz as
it has a FIFO size of 104 bytes. Hence limit the play rate for PM8350B
v1 to 8 KHz.

Change-Id: Ibeabd4c0229a54e2d99023c8fbc5970b1a7a1e64
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>