Remove dilation from transpose_conv2d

The specification does not have dilation for transpose_conv2d.
Removed dilation from the attributes for transpose.
Rename outpad to out_pad for transpose conv2d to align with
specification

Signed-off-by: Eric Kunze <eric.kunze@arm.com>
Change-Id: Ifb0fb7121a6bf33601420366ce86f2f0b56353de
diff --git a/schema/tosa.fbs b/schema/tosa.fbs
index b0b219f..7830bd2 100644
--- a/schema/tosa.fbs
+++ b/schema/tosa.fbs
@@ -172,9 +172,8 @@
 }
 
 table TransposeConvAttribute {
-  outpad: [int32];
+  out_pad: [int32];
   stride: [int32];
-  dilation: [int32];
   output_shape: [int32];
 }