msm: remove code, dts, and references to MSM9625

We no longer support MSM9625 so remove various files and code associated
with it.  This is not a complete removal of MSM9625, but just removing
dts files, any file with 9625 in name, and any code that was associated
with CONFIG_ARCH_MSM9625.

Change-Id: I3d5405bb71a529806797adc81dd628996000acdc
Signed-off-by: Kumar Gala <galak@codeaurora.org>