[sparkplug] Disable Batch compilation on unsupported platforms

Batch compilation needs to remain disabled on unsupported platforms
to avoid this compilation error:

error: assignment of read-only location '* conclusion_pointer'

Bug: v8:11790, v8:11420
Change-Id: I64aaf6476fdb585f8210331f31b01ebefe9c61c0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2949969Reviewed-by: Patrick Thier <pthier@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#75071}

src/flags/flag-definitions.h

@@ -662,10 +662,12 @@ DEFINE_BOOL(sparkplug, false, "enable experimental Sparkplug baseline compiler")
 DEFINE_BOOL(always_sparkplug, false, "directly tier up to Sparkplug code")
 #if ENABLE_SPARKPLUG
 DEFINE_IMPLICATION(always_sparkplug, sparkplug)
-#endif
-DEFINE_STRING(sparkplug_filter, "*", "filter for Sparkplug baseline compiler")
 DEFINE_BOOL(baseline_batch_compilation, true, "batch compile Sparkplug code")
 DEFINE_NEG_NEG_IMPLICATION(sparkplug, baseline_batch_compilation)
+#else
+DEFINE_BOOL(baseline_batch_compilation, false, "batch compile Sparkplug code")
+#endif
+DEFINE_STRING(sparkplug_filter, "*", "filter for Sparkplug baseline compiler")
 DEFINE_INT(baseline_batch_compilation_threshold, 4 * KB,
            "the estimated instruction size of a batch to trigger compilation")
 DEFINE_BOOL(trace_baseline, false, "trace baseline compilation")