ahci: add support for Hisilicon sata

The hip04 SoC of hisilicon has an AHCI compliant SATA controller.
This patch adds the compatible string, and the controller is compliant
with the ahci 1.3 and sata 3.0 specification.

ISSUE: The hardware has defective designs.

Signed-off-by: Kefeng Wang <kefeng.wang@linaro.org>

drivers/ata/ahci_platform.c

@@ -330,6 +330,7 @@ static const struct of_device_id ahci_of_match[] = {
 	{ .compatible = "snps,spear-ahci", },
 	{ .compatible = "snps,exynos5440-ahci", },
 	{ .compatible = "ibm,476gtr-ahci", },
+	{ .compatible = "hisilicon,hisi-ahci", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, ahci_of_match);