arm64: dts: ti: k3-am65*: Remove #address-cells/#size-cells from flash nodes

Specifying partitions directly in the flash node is deprecated, a
fixed-partitions node should be used instead. Therefore, it doesn't
make sense to have these properties in the flash nodes.

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Link: https://lore.kernel.org/r/20220203140240.973690-2-matthias.schiffer@ew.tq-group.com