powerpc/85xx: add CONFIG_SYS_TEXT_BASE_SPL for 85xx nand spl build

Introduce a SPL specific CONFIG_SYS_TEXT_BASE_SPL define to be used by
the linker.  This has similiar semantics to CONFIG_SYS_TEXT_BASE however
since SPL is a unqiue image we introduce a new variable to control its
text base address.

Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/P1_P2_RDB.h b/include/configs/P1_P2_RDB.h
index b99f383..08c5ef9 100644
--- a/include/configs/P1_P2_RDB.h
+++ b/include/configs/P1_P2_RDB.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009 Freescale Semiconductor, Inc.
+ * Copyright 2009-2010 Freescale Semiconductor, Inc.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -46,7 +46,12 @@
 #ifdef CONFIG_NAND
 #define CONFIG_NAND_U_BOOT		1
 #define CONFIG_RAMBOOT_NAND		1
+#ifdef CONFIG_NAND_SPL
+#define CONFIG_SYS_TEXT_BASE_SPL 0xfff00000
+#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE_SPL /* start of monitor */
+#else
 #define CONFIG_SYS_TEXT_BASE		0xf8f82000
+#endif /* CONFIG_NAND_SPL */
 #endif
 
 #ifdef CONFIG_SDCARD
@@ -63,6 +68,10 @@
 #define CONFIG_SYS_TEXT_BASE		0xeff80000
 #endif
 
+#ifndef CONFIG_SYS_MONITOR_BASE
+#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE	/* start of monitor */
+#endif
+
 /* High Level Configuration Options */
 #define CONFIG_BOOKE		1	/* BOOKE */
 #define CONFIG_E500		1	/* BOOKE e500 family */
@@ -192,8 +201,6 @@
 #define CONFIG_SYS_FLASH_ERASE_TOUT	60000	/* Flash Erase Timeout (ms) */
 #define CONFIG_SYS_FLASH_WRITE_TOUT	500	/* Flash Write Timeout (ms) */
 
-#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE	/* start of monitor */
-
 #if defined(CONFIG_SYS_SPL) || defined(CONFIG_RAMBOOT_NAND) \
 	|| defined(CONFIG_RAMBOOT_SDCARD) || defined(CONFIG_RAMBOOT_SPIFLASH)
 #define CONFIG_SYS_RAMBOOT