ARM: dts: msm: Remove the pps support in sdxprairie

Revert the change to support pps in emac hw.

Change-Id: I826dfda247b0dd743055c9c40020ae935b68cabe
Acked-by: Rahul Kawadgave <rahulak@qti.qualcomm.com>
Signed-off-by: Michael Adisumarta <madisuma@codeaurora.org>