Revert "ARM: dts: msm: Enable lpm and modify boot option for QCS405"

This reverts commit 7c5cb7eb.
Issue causing PCIe problems was fixed so enabling PCIe again
by reverting this temporary change which disabled it.

Change-Id: I5957b7213128d5b201cbfb2078685120900b0ad8
Signed-off-by: Gustavo Solaira <gustavos@codeaurora.org>