ARM: dts: Remove disabled camera nodes from sdxpoorwills

libufdt can now catch overlay application process from failing silently
without throwing an error. It will now report error in the application of
the overlay doesnot have a node being found.

Change-Id: I356c66b8804ea18c5eeb285d604d255aa84c4b81
Signed-off-by: VijayaKumar T M <vtmuni@codeaurora.org>
Signed-off-by: Eruvaram Kumar Raja Reddy <erajared@codeaurora.org>