powerpc/85xx: Create dts of each core in CAMP mode for P1020RDB

powerpc/85xx: Create dts of each core in CAMP mode for P1020RDB

Create the dts files for each core and splits the devices between the two
cores for P1020RDB.

Core0 has core0 to have memory, l2, i2c, spi, gpio, tdm, dma, usb, eth1,
eth2, sdhc, crypto, global-util, message, pci0, pci1, msi.
Core1 has l2, eth0, crypto.

MPIC is shared between two cores but each core will protect its interrupts
from other core by using "protected-sources" of mpic.

Fix compatible property for global-util node of P1020si.dtsi.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>