zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/sysdeps/linux/bfin/sram-free.c b/ap/build/uClibc/libc/sysdeps/linux/bfin/sram-free.c
new file mode 100644
index 0000000..8260eb6
--- /dev/null
+++ b/ap/build/uClibc/libc/sysdeps/linux/bfin/sram-free.c
@@ -0,0 +1,6 @@
+#include <unistd.h>
+#include <errno.h>
+#include <sys/syscall.h>
+#include <bfin_sram.h>
+
+_syscall1 (int, sram_free, const void *, addr)