powerpc: T1023RDB: Remove macro CONFIG_T1023RDB

Use TARGET_T1023RDB from Kconfig instead.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/t102xrdb/t102xrdb.h b/board/freescale/t102xrdb/t102xrdb.h
index ae5c60f..6634e7a 100644
--- a/board/freescale/t102xrdb/t102xrdb.h
+++ b/board/freescale/t102xrdb/t102xrdb.h
@@ -9,7 +9,7 @@
 
 void fdt_fixup_board_enet(void *blob);
 void pci_of_setup(void *blob, bd_t *bd);
-#ifdef CONFIG_T1023RDB
+#ifdef CONFIG_TARGET_T1023RDB
 static u32 t1023rdb_ctrl(u32 ctrl_type);
 static void fdt_enable_nor(void *blob);
 #endif