arch: arm: add support for mdm9607 target

Add board related configuration for mdm9607 soc
This is snapshot of board config as of msm-3.18.c8.
'commit 69da6b6721b  (Promotion of kernel.lnx.3.18.c8-190717)'.

Change-Id: Ib64f80e9e9dfb6555826323fb6c59a2c1651b727
Signed-off-by: Suresh Kumar Allam <allamsuresh@codeaurora.org>