drivers: add the support for Freescale SATA controller

Add the Freescale on-chip SATA controller driver to u-boot, The SATA controller is used on the 837x and 8315 targets, The driver can be used to load kernel, fs and dtb.

The features list:
- 1.5/3 Gbps link speed
- LBA48, LBA28 support
- DMA and FPDMA support
- Two ports support

---
 drivers/block/Makefile   |    1 +
 drivers/block/fsl_sata.c |  916 ++++++++++++++++++++++++++++++++++++++++++++++
 drivers/block/fsl_sata.h |  374 +++++++++++++++++++
 3 files changed, 1291 insertions(+), 0 deletions(-)
 create mode 100644 drivers/block/fsl_sata.c
 create mode 100644 drivers/block/fsl_sata.h

index d63ca2d..dca3547 100644
@@ -27,6 +27,7 @@ LIB 	:= $(obj)libblock.a
 
 COBJS-y += ahci.o
 COBJS-y += ata_piix.o
+COBJS-$(CONFIG_FSL_SATA) += fsl_sata.o
 COBJS-$(CONFIG_LIBATA) += libata.o
 COBJS-y += sil680.o
 COBJS-y += sym53c8xx.o

1.5.4.rc4