common: Drop linux/stringify.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/MPC8313ERDB_NOR.h b/include/configs/MPC8313ERDB_NOR.h
index 382c39c..029d2f1 100644
--- a/include/configs/MPC8313ERDB_NOR.h
+++ b/include/configs/MPC8313ERDB_NOR.h
@@ -18,6 +18,7 @@
 #define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE	/* start of monitor */
 #endif
 
+#include <linux/stringify.h>
 #define CONFIG_PCI_INDIRECT_BRIDGE
 
 /*