ti-dm: Add support for J784S4 SoC

Add DM FW support for J784S4 SoC.
This is part of 08.04.05

MD5 checksum:
4c886f743d1f6daa79b650332c18996d  ti-dm/j784s4/ipc_echo_testb_mcu1_0_release_strip.xer5f

Signed-off-by: Sheng Zhao <shengzhao@ti.com>
Signed-off-by: Hari Nagalla <hnagalla@ti.com>