3 SATA nodes are defined to describe on-chip Serial ATA controllers.
4 Each SATA controller should have its own node.
7 - compatible : compatible list, contains "snps,spear-ahci"
8 - interrupts : <interrupt mapping for SATA IRQ>
9 - reg : <registers mapping>
12 - dma-coherent : Present if dma operations are coherent
16 compatible = "snps,spear-ahci";
17 reg = <0xffe08000 0x1000>;