arm: dts: k3-am64-evm: Mark dependent nodes for pre-relocation phase

CPSW node needs PHY, MDIO, pinmux, DMA and INTC nodes.
USB and MMC nodes need pinmux.

Mark them as 'bootph-all' so they are available in all
pre-relocation phases.

Fixes below dts warning:

<stdout>: Warning (dmas_property): /bus@f4000/ethernet@8000000:dmas: Could not get phandle node for (cell 0)

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Nishanth Menon <nm@ti.com>