arm64: dts: ti: k3-*: Drop address and size cells from flash nodes

Specifying partitions directly under the flash nodes is deprecated. A
partitions node should used instead. The address and size cells are not
needed. Remove them.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Apurva <Nandan&lt;a-nandan@ti.com>
Link: https://lore.kernel.org/r/20220217181025.1815118-2-p.yadav@ti.com