soc: qcom: qpnp-haptic: Remove use-play-irq and use-sc-irq flags

Remove use_play_irq and use_sc_irq flags as they are not really
needed. Interrupts can be obtained and registered always. Keep
the play interrupt enabled only for buffer mode.

Change-Id: Ie530819ed18b048d43d59dd7a0dc5f73cc3a9b70
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>