ARM: dts: msm: Rename mtp-3020mah.dtsi to itech-3020mah.dtsi

It would be more appropriate to name the battery data dtsi files
based on the manufacturer than based on the board name. Rename it.

Change-Id: I99538c57d6683a72ac6622f555155d9689e6f4be
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>