Adds "arch" argument to MIPS MDCT

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>

celt/mips/mdct_mipsr1.h

@@ -58,7 +58,7 @@
 /* Forward MDCT trashes the input array */
 #define OVERRIDE_clt_mdct_forward
 void clt_mdct_forward(const mdct_lookup *l, kiss_fft_scalar *in, kiss_fft_scalar * OPUS_RESTRICT out,
-      const opus_val16 *window, int overlap, int shift, int stride)
+      const opus_val16 *window, int overlap, int shift, int stride, int arch)
 {
    int i;
    int N, N2, N4;
@@ -72,6 +72,9 @@ void clt_mdct_forward(const mdct_lookup *l, kiss_fft_scalar *in, kiss_fft_scalar
       MULT16_32_Q15() on ARM. */
    int scale_shift = st->scale_shift-1;
 #endif
+
+    (void)arch;
+
    SAVE_STACK;
    scale = st->scale;
 
@@ -181,12 +184,14 @@ void clt_mdct_forward(const mdct_lookup *l, kiss_fft_scalar *in, kiss_fft_scalar
 
 #define OVERRIDE_clt_mdct_backward
 void clt_mdct_backward(const mdct_lookup *l, kiss_fft_scalar *in, kiss_fft_scalar * OPUS_RESTRICT out,
-      const opus_val16 * OPUS_RESTRICT window, int overlap, int shift, int stride)
+      const opus_val16 * OPUS_RESTRICT window, int overlap, int shift, int stride, int arch)
 {
    int i;
    int N, N2, N4;
    const kiss_twiddle_scalar *trig;
 
+    (void)arch;
+
    N = l->n;
    trig = l->trig;
    for (i=0;i<shift;i++)