microblaze: Change cache report messages

It is more accurate to show that caches are OFF instead of FAIL.

Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/lib/board.c

@@ -116,8 +116,8 @@ void board_init (void)
 	}
 
 	puts ("SDRAM :\n");
-	printf ("\t\tIcache:%s\n", icache_status() ? "OK" : "FAIL");
-	printf ("\t\tDcache:%s\n", dcache_status() ? "OK" : "FAIL");
+	printf ("\t\tIcache:%s\n", icache_status() ? "ON" : "OFF");
+	printf ("\t\tDcache:%s\n", dcache_status() ? "ON" : "OFF");
 	printf ("\tU-Boot Start:0x%08x\n", TEXT_BASE);
 
 #if defined(CONFIG_CMD_FLASH)