arm: dts: k3-am62: Bump dtsi from linux v6.5-rc1

Update the am62 and am625 device-trees from linux v6.5-rc1. This needed
the following tweaks to the u-boot specific dtsi as well:
- Switch tick-timer to the main_timer as it's now defined in the main dtsi
- Secure proxies are defined in SoC dtsi
- Drop duplicate nodes - u-boot.dtsi is includes in r5-sk, no need for
  either the definitions from main.dtsi OR duplication from u-boot.dtsi

Reviewed-by: Roger Quadros <rogerq@kernel.org>
Cc: Francesco Dolcini <francesco@dolcini.it>
Cc: Sjoerd Simons <sjoerd@collabora.com>
Cc: Wadim Egorov <w.egorov@phytec.de>
Signed-off-by: Nishanth Menon <nm@ti.com>