Fix quoting bug introduced by commit 74de7aef

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/pn62/cmd_pn62.c b/board/pn62/cmd_pn62.c
index b9f3bdb..ff5d63e 100644
--- a/board/pn62/cmd_pn62.c
+++ b/board/pn62/cmd_pn62.c
@@ -157,7 +157,7 @@
 	char *s;
 
 	if (((s = getenv("autoscript")) != NULL) && (strcmp(s,"yes") == 0)) {
-		printf ("Running "source" command at addr 0x%08lX",
+		printf ("Running \"source\" command at addr 0x%08lX",
 			load_addr);
 
 		s = getenv ("autoscript_uname");