aboot: mdtp : Add generic MTDP image file

This change abstracts MDTP UI target specifics picture parameters from
LK code.
with this change, picture parameters such as width, height, and
offset of the picture inside mdtp.img, comes from mdtp.img
header, rather than hard-coded in LK.

Change-Id: Ife509642014cd4b6033a34d5dc0d3c1c73a89698
9 files changed