arm: dts: k3-am625-verdin: fix boot

A53 U-Boot proper got broken because nodes marked as 'bootph-pre-ram'
are no longer available in U-Boot proper before relocation.

Fix this by marking all nodes in u-boot.dtsi as 'bootph-all'.

Fixes: 9e644284 ("dm: core: Report bootph-pre-ram/sram node as pre-reloc after relocation")
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>