PowerPC: correct the SATA for p1/p2 rdb-pc platform

For p1/p2 rdb-pc platform, use the PCIe-SATA Silicon Image SATA controller.
Therefore, the SATA driver will use sata_sil, instead sata_sil3114.

Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
CC: Andy Fleming <afleming@gmail.com>

include/configs/p1_p2_rdb_pc.h

@@ -184,7 +184,7 @@
 #define CONFIG_ENV_OVERWRITE
 
 #define CONFIG_CMD_SATA
-#define CONFIG_SATA_SIL3114
+#define CONFIG_SATA_SIL
 #define CONFIG_SYS_SATA_MAX_DEVICE	2
 #define CONFIG_LIBATA
 #define CONFIG_LBA48