arm64: dts: ti: Add DP display overlay for AM654 EVM

commit eb404886f43cfe81f2d9ac665b721333ff029d8c from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git



Add support for Toshiba TC358867 based expansion board for TI's AM654
EVM. The expansion board has a DisplayPort 1.1 output with 2 lanes.
The TC358867 bridge converts from parallel DPI signals to DP. Add the
bridge device, pinmux and endpoint nodes connecting to DSS endpoint.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
[a-bhatia1: Make syntax changes]
Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>