SATA: add driver for MX5 / MX6 SOCs

This driver is part of Freescale's LTIB for
MX5 / MX6.

Signed-off-by: Stefano Babic <sbabic@denx.de>
Signed-off-by: Terry Lv <r65388@freescale.com>
CC: Fabio Estevam <fabio.estevam@freescale.com>
CC: Dirk Behme <dirk.behme@de.bosch.com>
diff --git a/include/ahci.h b/include/ahci.h
index 465ea7f..c4fb9e7 100644
--- a/include/ahci.h
+++ b/include/ahci.h
@@ -30,12 +30,13 @@
 #define AHCI_PCI_BAR		0x24
 #define AHCI_MAX_SG		56 /* hardware max is 64K */
 #define AHCI_CMD_SLOT_SZ	32
+#define AHCI_MAX_CMD_SLOT	32
 #define AHCI_RX_FIS_SZ		256
 #define AHCI_CMD_TBL_HDR	0x80
 #define AHCI_CMD_TBL_CDB	0x40
 #define AHCI_CMD_TBL_SZ		AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16)
-#define AHCI_PORT_PRIV_DMA_SZ	AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ	\
-				+ AHCI_RX_FIS_SZ
+#define AHCI_PORT_PRIV_DMA_SZ	(AHCI_CMD_SLOT_SZ * AHCI_MAX_CMD_SLOT + \
+				AHCI_CMD_TBL_SZ	+ AHCI_RX_FIS_SZ)
 #define AHCI_CMD_ATAPI		(1 << 5)
 #define AHCI_CMD_WRITE		(1 << 6)
 #define AHCI_CMD_PREFETCH	(1 << 7)