feat(plat/marvell): introduce t9130_cex7_eval

This patch adds the necessary files to support
the SolidRun CN913X CEx7 Evaluation Board.

Because the DRAM connectivity and SerDes settings
is shared with the CN913X DB - reuse relevant
board-specific files.

Change-Id: I75a4554a4373953ca3fdf3b04c4a29c2c4f8ea80
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
3 files changed