feat(ti-k3): add support for J784S4 SoCs

The J784S4 SoC has two quad Cortex-A72 core clusters. This is the first
SoC in the K3 family with Quad cores in a A-72 cluster. So, a new board
configuration is introduced to support quad core clusters on the J784S4
SoC of the K3 family of devices.

See J784S4 Technical Reference Manual (SPRUJ52 - JUNE 2022)
for further details: http://www.ti.com/lit/zip/spruj52



Signed-off-by: Hari Nagalla <hnagalla@ti.com>
Change-Id: I0ed1f14ab32a56ae06e3df3161ace4597d14a48d