PPC [liftoff]: Use scratch instead of ip

scratch is already being initialized to avoid
overwriting offset_reg. We will need to use it instead of ip.

Change-Id: I4ffb93341f64dd8520e2409d6a28783738627ca2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3322977Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#78303}

src/wasm/baseline/ppc/liftoff-assembler-ppc.h

@@ -432,7 +432,7 @@ void LiftoffAssembler::Load(LiftoffRegister dst, Register src_addr,
           scratch = GetRegisterThatIsNotOneOf(src_addr);
           push(scratch);
         }
-        LoadF64LE(dst.fp(), src_op, r0, ip);
+        LoadF64LE(dst.fp(), src_op, r0, scratch);
         if (offset_reg == ip) {
           pop(scratch);
         }