powerpc/P5040DS: enable SATA support

The define CONFIG_FSL_SATA_V2 is missing, so SATA is not available
in U-boot.
Signed-off-by: NShaohui Xie <Shaohui.Xie@freescale.com>
Reviewed-by: NYork Sun <yorksun@freescale.com>

include/configs/P5040DS.h

@@ -17,6 +17,7 @@
 #define CONFIG_MMC
 #define CONFIG_NAND_FSL_ELBC
 #define CONFIG_PCIE3
+#define CONFIG_FSL_SATA_V2
 #define CONFIG_SYS_FSL_RAID_ENGINE
 
 #define CONFIG_ICS307_REFCLK_HZ		25000000  /* ICS307 ref clk freq */