Fixed an OF-tree off-by-one bug when adding a new property name.

This bug will cause the kernel booting to pause a long time.

Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
(cherry picked from 2f15776ccc commit)

common/ft_build.c

@@ -103,7 +103,7 @@ void ft_prop(struct ft_cxt *cxt, const char *name, const void *data, int sz)
 	if (off == -1) {
 		memcpy(cxt->p_end, name, strlen(name) + 1);
 		off = cxt->p_end - cxt->p;
-		cxt->p_end += strlen(name) + 2;
+		cxt->p_end += strlen(name) + 1;
 	}
 
 	/* now put offset from beginning of *STRUCTURE* */