target/mips: Rename unused sysemu argument of OP_LD_ATOMIC()

In commit 6d0cad12594 ("target/mips: Finish conversion to
tcg_gen_qemu_{ld,st}_*") we renamed the argument of the user
definition. Rename the system part for coherency. Since the
argument is ignored, prefix with 'ignored_'.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241010215015.44326-9-philmd@linaro.org>
diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c
index 6f047d6..6ba8371 100644
--- a/target/mips/tcg/translate.c
+++ b/target/mips/tcg/translate.c
@@ -1957,7 +1957,7 @@
     tcg_gen_st_tl(ret, tcg_env, offsetof(CPUMIPSState, llval));            \
 }
 #else
-#define OP_LD_ATOMIC(insn, fname)                                          \
+#define OP_LD_ATOMIC(insn, ignored_memop)                                  \
 static inline void op_ld_##insn(TCGv ret, TCGv arg1, int mem_idx,          \
                                 DisasContext *ctx)                         \
 {                                                                          \