Math: IIR DF1: HiFi3: No need to initialize the read align register

The set to AE_ZALIGN64() is needed only for aligning writes, not
reads. The IIR coefficients are only read in function iir_df1()
so this is not needed.

Ref: HiFi3 DSP User's Guide, page 35, aligning stores.

Signed-off-by: Seppo Ingalsuo <[email protected]>

src/math/iir_df1_hifi3.c

@@ -49,7 +49,7 @@
 int32_t iir_df1(struct iir_state_df1 *iir, int32_t x)
 {
 	ae_int64 acc;
-	ae_valign coef_align = AE_ZALIGN64();
+	ae_valign coef_align;
 	ae_int32x2 coef_a2a1;
 	ae_int32x2 coef_b2b1;
 	ae_int32x2 coef_b0;