arm64: dts: ti: k3-am65: Add MIT license along with GPL-2.0

Modify license to include dual licensing as GPL-2.0-only OR MIT
license for SoC and TI evm device tree files. This allows for Linux
kernel device tree to be used in other Operating System ecosystems
such as Zephyr or FreeBSD.

While at this, update the GPL-2.0 to be GPL-2.0-only to be in sync
with latest SPDX conventions (GPL-2.0 is deprecated).

While at this, update the TI copyright year to sync with current year
to indicate license change (and add it at least for one file which was
missing TI copyright).

Cc: "Alexander A. Klimov" <grandmaster@al2klimov.de>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Cc: Pierre Gondois <pierre.gondois@arm.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Cc: Tony Lindgren <tony@atomide.com>

Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Acked-by: Pierre Gondois <pierre.gondois@arm.com>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240122145539.194512-7-nm@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arm64: dts: ti: k3-am65: Add AM652 dtsi file

The AM652 is basically a AM654 but with 2 cores instead of 4. Add a
DTSI file for AM652 matching AM654 except this core difference.

This removes the need to remove the extra cores from AM654 manually
in DT files for boards that use the AM652 variant. Do that for the
IOT2050 boards here.

Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20231205162358.23904-1-afd@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>