powerpc/p1023rdb: Enable configs to use generic board code

Add configs:
  o CONFIG_SYS_GENERIC_BOARD
  o CONFIG_DISPLAY_BOARDINFO
in P1023RDB config header file to use U-boot generic
board code.

Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

include/configs/P1023RDB.h

@@ -10,6 +10,9 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+#define CONFIG_SYS_GENERIC_BOARD
+#define CONFIG_DISPLAY_BOARDINFO
+
 #ifndef CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_TEXT_BASE	0xeff40000
 #endif