Move daala_fdct32() / daala_idct32() into daala_tx.c.

This commit has no impact on metrics.

Change-Id: Iea355a67a4b689325deec320dd4b0b313befe7d1
diff --git a/av1/common/daala_tx.c b/av1/common/daala_tx.c
index 5dca5f8..834682e 100644
--- a/av1/common/daala_tx.c
+++ b/av1/common/daala_tx.c
@@ -4214,3 +4214,21 @@
   od_bin_idst16(x, 1, y);
   for (i = 0; i < 16; i++) output[i] = (tran_low_t)x[i];
 }
+
+void daala_fdct32(const tran_low_t *input, tran_low_t *output) {
+  int i;
+  od_coeff x[32];
+  od_coeff y[32];
+  for (i = 0; i < 32; i++) x[i] = (od_coeff)input[i];
+  od_bin_fdct32(y, x, 1);
+  for (i = 0; i < 32; i++) output[i] = (tran_low_t)y[i];
+}
+
+void daala_idct32(const tran_low_t *input, tran_low_t *output) {
+  int i;
+  od_coeff x[32];
+  od_coeff y[32];
+  for (i = 0; i < 32; i++) y[i] = (od_coeff)input[i];
+  od_bin_idct32(x, 1, y);
+  for (i = 0; i < 32; i++) output[i] = (tran_low_t)x[i];
+}