ARM: dts: msm: Correct the haptics DT properties for PMI8950

Correct the haptics device tree properties to be aligned with the
leds-qpnp-haptics driver.

Change-Id: I8be2167206b5419f3a9ef9972709c8b8332fe130
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>