powerpc/p5040: enable PBL tool support

Provided a default RCW for P5040, then it can use PBL to build
ramboot image.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

board/freescale/corenet_ds/rcw_p5040ds.cfg

@@ -0,0 +1,11 @@
+#
+# Default RCW for P5040DS.
+#
+
+#PBL preamble and RCW header
+aa55aa55 010e0100
+#64 bytes RCW data
+0c580000 00000000 22121200 00000000
+089c4400 00283000 58000000 61000000
+00000000 00000000 00000000 10070000
+00000000 00000000 00000000 00000000

include/configs/corenet_ds.h

@@ -38,6 +38,8 @@
 #define CONFIG_PBLRCW_CONFIG $(SRCTREE)/board/freescale/corenet_ds/rcw_p4080ds.cfg
 #elif defined(CONFIG_P5020DS)
 #define CONFIG_PBLRCW_CONFIG $(SRCTREE)/board/freescale/corenet_ds/rcw_p5020ds.cfg
+#elif defined(CONFIG_P5040DS)
+#define CONFIG_PBLRCW_CONFIG $(SRCTREE)/board/freescale/corenet_ds/rcw_p5040ds.cfg
 #endif
 #endif