[sparkplug] Simplify arch-guards to ENABLE_SPARKPLUG

There is still a place to simplify.

Bug: v8:11420, v8:11421
Change-Id: I774139c52d911323f162350532a493e70f518643
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3096885
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76296}

src/baseline/baseline-batch-compiler.cc

@@ -6,9 +6,8 @@
 
 // TODO(v8:11421): Remove #if once baseline compiler is ported to other
 // architectures.
-#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X64 || V8_TARGET_ARCH_ARM64 ||     \
-    V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_RISCV64 || V8_TARGET_ARCH_MIPS64 || \
-    V8_TARGET_ARCH_MIPS
+#include "src/flags/flags.h"
+#if ENABLE_SPARKPLUG
 
 #include "src/baseline/baseline-compiler.h"
 #include "src/codegen/compiler.h"

src/builtins/builtins-internal-gen.cc

@@ -1053,9 +1053,7 @@ void Builtins::Generate_MemMove(MacroAssembler* masm) {
 
 // TODO(v8:11421): Remove #if once baseline compiler is ported to other
 // architectures.
-#if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X64 || V8_TARGET_ARCH_ARM64 ||     \
-    V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_RISCV64 || V8_TARGET_ARCH_MIPS64 || \
-    V8_TARGET_ARCH_MIPS
+#if ENABLE_SPARKPLUG
 void Builtins::Generate_BaselineLeaveFrame(MacroAssembler* masm) {
   EmitReturnBaseline(masm);
 }