Fix typos in END_FUNCTION arguments in ARM64 assembly kernels

Fix compilation errors with GNU ARM64 toolchain

PiperOrigin-RevId: 281967270
diff --git a/src/f32-gemm/6x8-aarch64-neonfma-cortex-a73.S.in b/src/f32-gemm/6x8-aarch64-neonfma-cortex-a73.S.in
index 23daaf6..3479796 100644
--- a/src/f32-gemm/6x8-aarch64-neonfma-cortex-a73.S.in
+++ b/src/f32-gemm/6x8-aarch64-neonfma-cortex-a73.S.in
@@ -734,7 +734,7 @@
         LDP  d8,  d9, [sp], 64
         RET
 
-END_FUNCTION f32_gemm${"inc" if INC else ""}_ukernel_6x8__aarch64_neonfma_cortex_a73
+END_FUNCTION xnn_f32_gemm${"inc" if INC else ""}_ukernel_6x8__aarch64_neonfma_cortex_a73
 
 #ifdef __ELF__
 .section ".note.GNU-stack","",%progbits