ARM: O5/dra7xx: Add SATA boot support

Add the SATA boot support for OMAP5 and dra7xx.

Renamed the omap_sata_init to the common init_sata(int dev)
for commonality in with sata stack.

Added the ROM boot device ID for SATA.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/arch/arm/include/asm/arch-omap5/spl.h b/arch/arm/include/asm/arch-omap5/spl.h
index 2d5a62e..4a279cf 100644
--- a/arch/arm/include/asm/arch-omap5/spl.h
+++ b/arch/arm/include/asm/arch-omap5/spl.h
@@ -15,6 +15,7 @@
 #define BOOT_DEVICE_MMC1        5
 #define BOOT_DEVICE_MMC2        6
 #define BOOT_DEVICE_MMC2_2	7
+#define BOOT_DEVICE_SATA	9
 #define BOOT_DEVICE_SPI		10
 #define BOOT_DEVICE_UART	0x43