[project][imx7d] Update for imx target changes

Choice of debug UART should be on target level
as this is what target is for.

All definitions for MEMBASE, MEMSIZE and KERNEL_BASE
are the same. Move them to platform and make them default.

Change-Id: If40b265346097db05175b9d7b83d6057365880fa
4 files changed
tree: f123d2ff2b9dd488ed21ce1628bb06fd875837e1
  2. project/