nds32: Remove include files from common.h

With a few tweaks we can avoid including these files, which are only
needed by two C files.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/AndesTech/adp-ag101p/adp-ag101p.c b/board/AndesTech/adp-ag101p/adp-ag101p.c
index a462941..79608f4 100644
--- a/board/AndesTech/adp-ag101p/adp-ag101p.c
+++ b/board/AndesTech/adp-ag101p/adp-ag101p.c
@@ -11,6 +11,8 @@
 #include <netdev.h>
 #endif
 #include <linux/io.h>
+#include <asm/io.h>
+#include <asm/mach-types.h>
 
 #include <faraday/ftsdc010.h>
 #include <faraday/ftsmc020.h>