arm64: dts: ti: k3-am68-sk*: Add bootph-* properties

Adds bootph-* properties to the leaf nodes to enable bootloaders to
utilise them.

Following adds bootph-* to:
- main_uart8, mcu_uart0(DM), wkup_uart0(TIFS) for Traces
- mmc1, ospi0 for enabling various bootmodes.
- eeprom for board detection

Reviewed-by: Udit Kumar <u-kumar1@ti.com>
Signed-off-by: Manorit Chawdhry <m-chawdhry@ti.com>
Link: https://lore.kernel.org/r/20241024-b4-upstream-bootph-all-v6-9-2af90e3a4fe7@ti.com


Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>