add s4 ra188 bl40 signed binary.

Change-Id: Iae00c3f2ce916ac43c1fe4442cfb421329075fd8
Signed-off-by: Zhongfu Luo <zhongfu.luo@amlogic.com>
diff --git a/s4/ra188/blob-bl40.bin.signed b/s4/ra188/blob-bl40.bin.signed
new file mode 100644
index 0000000..3224746
--- /dev/null
+++ b/s4/ra188/blob-bl40.bin.signed
Binary files differ