Convert CONFIG_TPL_TEXT_BASE to Kconfig

This converts the following to Kconfig:
   CONFIG_TPL_TEXT_BASE

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/p1_p2_rdb_pc.h b/include/configs/p1_p2_rdb_pc.h
index 33f052d..b907a1a 100644
--- a/include/configs/p1_p2_rdb_pc.h
+++ b/include/configs/p1_p2_rdb_pc.h
@@ -102,7 +102,6 @@
 #define CONFIG_SPL_NAND_INIT
 #define CONFIG_SPL_COMMON_INIT_DDR
 #define CONFIG_SPL_MAX_SIZE		(128 << 10)
-#define CONFIG_TPL_TEXT_BASE		0xf8f81000
 #define CONFIG_SYS_MPC85XX_NO_RESETVEC
 #define CONFIG_SYS_NAND_U_BOOT_SIZE	(832 << 10)
 #define CONFIG_SYS_NAND_U_BOOT_DST	(0x11000000)
@@ -130,7 +129,7 @@
 
 #ifndef CONFIG_SYS_MONITOR_BASE
 #ifdef CONFIG_TPL_BUILD
-#define CONFIG_SYS_MONITOR_BASE	CONFIG_TPL_TEXT_BASE
+#define CONFIG_SYS_MONITOR_BASE	0xf8f81000
 #elif defined(CONFIG_SPL_BUILD)
 #define CONFIG_SYS_MONITOR_BASE	CONFIG_SPL_TEXT_BASE
 #else