linux-user: Only include 'exec/tb-flush.h' header when necessary

Very few source files require to access "exec/tb-flush.h"
declarations, and except a pair, they all include it
explicitly. No need to overload the generic "user-internals.h".

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-Id: <20250102182521.65428-2-philmd@linaro.org>

linux-user/mmap.c

@@ -21,6 +21,7 @@
 #include "trace.h"
 #include "exec/log.h"
 #include "exec/page-protection.h"
+#include "exec/tb-flush.h"
 #include "exec/translation-block.h"
 #include "qemu.h"
 #include "user/page-protection.h"

linux-user/syscall.c

@@ -26,6 +26,7 @@
 #include "tcg/startup.h"
 #include "target_mman.h"
 #include "exec/page-protection.h"
+#include "exec/tb-flush.h"
 #include "exec/translation-block.h"
 #include <elf.h>
 #include <endian.h>

linux-user/user-internals.h

@@ -20,7 +20,6 @@
 
 #include "user/thunk.h"
 #include "exec/exec-all.h"
-#include "exec/tb-flush.h"
 #include "qemu/log.h"
 
 extern char *exec_path;