SMEM-P: add debug prints for coordinates

dsv4/kernels/attention/fmha.py

@@ -372,6 +372,10 @@ class FmhaKernel:
                             # Write actual P value (not test pattern)
                             p_val_bf16 = tTMEM_LOADrS_frg[k, j].to(self.q_dtype)
                             sP[pv_coord] = p_val_bf16  # Tensor indexing
+                            
+                            # DEBUG: Print first few coordinates to verify mapping
+                            if self.use_smem_p and k < 2 and j < 2:
+                                print(f"[SMEM-P DEBUG] k={k}, j={j}, qk_coord=({m},{n}), pv_coord={pv_coord}")
                         
                         row_sum = row_sum + tTMEM_LOADrS_frg[k, j]
                     s_vec = tTMEM_LOADrS_frg[None, j].load()