ARM: msm: Add support for new board config SDM429W

This change adds  support for new board config arch SDM429W.

Change-Id: Ic47206a94bf64e1a97e88f6a41c989607e42f3bf
Signed-off-by: Archit Saxena <archsaxe@codeaurora.org>
Signed-off-by: Avaneesh Kumar Dwivedi <akdwived@codeaurora.org>