powerpc/CoreNet: add tool to support pbl image build.

Provides a tool to build boot Image for PBL(Pre boot loader) which is
used on Freescale CoreNet SoCs, PBL can be used to load some instructions
and/or data for pre-initialization. The default output image is u-boot.pbl,
for more details please refer to doc/README.pblimage.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/include/configs/corenet_ds.h b/include/configs/corenet_ds.h
index 8f6f39a..ad3622c 100644
--- a/include/configs/corenet_ds.h
+++ b/include/configs/corenet_ds.h
@@ -31,6 +31,14 @@
 #ifdef CONFIG_RAMBOOT_PBL
 #define CONFIG_RAMBOOT_TEXT_BASE	CONFIG_SYS_TEXT_BASE
 #define CONFIG_RESET_VECTOR_ADDRESS	0xfffffffc
+#define CONFIG_PBLPBI_CONFIG $(SRCTREE)/board/freescale/corenet_ds/pbi.cfg
+#if defined(CONFIG_P3041DS)
+#define CONFIG_PBLRCW_CONFIG $(SRCTREE)/board/freescale/corenet_ds/rcw_p3041ds.cfg
+#elif defined(CONFIG_P4080DS)
+#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
+#endif
 #endif
 
 #ifdef CONFIG_SRIO_PCIE_BOOT_SLAVE