Comment change x8 is a temporary params pointer

PiperOrigin-RevId: 379520889
diff --git a/src/f32-gemm/1x8-aarch64-neonfma-cortex-a53.S.in b/src/f32-gemm/1x8-aarch64-neonfma-cortex-a53.S.in
index 48eaaa0..575d111 100644
--- a/src/f32-gemm/1x8-aarch64-neonfma-cortex-a53.S.in
+++ b/src/f32-gemm/1x8-aarch64-neonfma-cortex-a53.S.in
@@ -17,9 +17,9 @@
 #     size_t cn_stride,         [sp] -> x14
 $if INC:
   #     const float*restrict acc,  [sp + 8] -> x15
-  #     const union xnn_f32_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])  [sp + 16] -> x8
+  #     const union xnn_f32_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])  [sp + 16] -> (x8)
 $else:
-  #     const union xnn_f32_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])  [sp + 8] -> x8
+  #     const union xnn_f32_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])  [sp + 8] -> (x8)
 
 # d8-d15, x19-x30 need to be preserved if used. x18 is reserved by the OS.