Add new signedness attributes to RESCALE

Signed-off-by: Eric Kunze <eric.kunze@arm.com>
Change-Id: I96202b90bff833654735a2f2306eb782d202b6e6
diff --git a/include/attribute.def b/include/attribute.def
index 9e4c461..b72f65a 100644
--- a/include/attribute.def
+++ b/include/attribute.def
@@ -78,14 +78,16 @@
               float, S, min_fp,
               float, S, max_fp)
 
-DEF_ATTRIBUTE(Rescale, 7,
+DEF_ATTRIBUTE(Rescale, 9,
               int32_t, S, input_zp,
               int32_t, S, output_zp,
               int32_t, V, multiplier,
               int32_t, V, shift,
               bool, S, scale32,
               bool, S, double_round,
-              bool, S, per_channel)
+              bool, S, per_channel,
+              bool, S, input_unsigned,
+              bool, S, output_unsigned)
 
 DEF_ATTRIBUTE(Mul, 1,
               int32_t, S, shift)
@@ -126,3 +128,4 @@
 
 DEF_ATTRIBUTE(FFT, 1,
               bool, S, inverse)
+