arm64: dts: ti: k3-j721s2-common-proc-board: Enable DisplayPort-1

arm64: dts: ti: k3-j721s2-common-proc-board: Enable DisplayPort-1

Enable DSI display for J721S2 EVM.

Add the endpoint nodes to describe connection from:
DSS => DSI Bridge => DSI to eDP bridge => DisplayPort-1

Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Tested-by: Harikrishna Shenoy <h-shenoy@ti.com>
Reviewed-by: Harikrishna Shenoy <h-shenoy@ti.com>
Reviewed-by: Udit Kumar <u-kumar1@ti.com>
Link: https://lore.kernel.org/r/20250716060114.52122-7-j-choudhary@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>