ata: ahci_platform: add 32-bit quirk for dwc-ahci

On TI Platforms using LPAE, SATA breaks with 64-bit DMA.
Restrict it to 32-bit.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

drivers/ata/ahci_platform.c

@@ -58,6 +58,9 @@ static int ahci_probe(struct platform_device *pdev)
 	if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
 		hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
 
+	if (of_device_is_compatible(dev->of_node, "snps,dwc-ahci"))
+		hpriv->flags |= AHCI_HFLAG_32BIT_ONLY;
+
 	rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info,
 				     &ahci_platform_sht);
 	if (rc)