Fixed a misaligned problem in PUSCH channel esti

An avx2 instruction in idft4096 introduced segfault sometimes

openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c

@@ -45,7 +45,7 @@ int nr_pusch_channel_estimation(PHY_VARS_gNB *gNB,
   int16_t *fl,*fm,*fr,*fml,*fmr,*fmm,*fdcl,*fdcr,*fdclh,*fdcrh;
   int ch_offset,symbol_offset, length_dmrs, UE_id = 0;
   unsigned short n_idDMRS[2] = {0,1}; //to update from pusch config
-  int32_t temp_in_ifft_0[8192*2] __attribute__((aligned(16)));
+  int32_t temp_in_ifft_0[8192*2] __attribute__((aligned(32)));
   int32_t **ul_ch_estimates_time =  gNB->pusch_vars[UE_id]->ul_ch_estimates_time;
 
 #ifdef DEBUG_CH