Update Neon code with generators for added comment

PiperOrigin-RevId: 386317855
diff --git a/src/qc8-igemm/gen/4x16-minmax-fp32-neonv8-mlal-lane.c b/src/qc8-igemm/gen/4x16-minmax-fp32-neonv8-mlal-lane.c
index 1f84e4c..fd2ad4d 100644
--- a/src/qc8-igemm/gen/4x16-minmax-fp32-neonv8-mlal-lane.c
+++ b/src/qc8-igemm/gen/4x16-minmax-fp32-neonv8-mlal-lane.c
@@ -464,6 +464,7 @@
       p -= 4 * sizeof(void*);
     } while (p != 0);
 
+    // Post-accumulation work
     float32x4_t vfpacc0x0123 = vcvtq_f32_s32(vacc0x0123);
     float32x4_t vfpacc0x4567 = vcvtq_f32_s32(vacc0x4567);
     float32x4_t vfpacc0x89AB = vcvtq_f32_s32(vacc0x89AB);