display: tool: add splash tool for generating logo file

Add logo_gen.py for generating splash log image, also provide
a default logo image.

bbbbbh '#' will be ignored, and an empty message aborts the commit.

Change-Id: I80eac1eaaa0f2a5198e5e420a40b107d5777120b
Merge "display: tool: add splash tool for generating logo file"
common: add msm8x28 support in init process

Add msm8x28 support for audio/bt/bms/lpm/mpdecision/usb configuration,
which keeps in accordance with msm8226.
Merge "common: add msm8x28 support in init process"