S390: use r1 as scratch register

ip holds the jump table slot.

Change-Id: Ia56bf62835155d58ef10e57d761088d0b9a9710d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3668285Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#80753}

src/builtins/s390/builtins-s390.cc

@@ -2963,7 +2963,7 @@ void Builtins::Generate_WasmCompileLazy(MacroAssembler* masm) {
     // ip now holds the jump table slot where we want to jump to in the end.
 
     // Restore registers.
-    __ MultiPopF64OrV128(fp_regs, ip);
+    __ MultiPopF64OrV128(fp_regs, r1);
     __ MultiPop(gp_regs);
   }