ARM: dts: MSM: Move dts-v1 tag from apq8094.dtsi to apq8094-mtp.dts

The dts version tag should reside in the top level .dts file.
Update this for apq8094 to be consistent with other device
trees.

Change-Id: I63045625c5fd992621fbf5a9929d4c9bb8ef81f9
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>