linux-user: remove useless #if

Remove a "#if defined(XX) || defined(YY) || ..." with all available
targets
Signed-off-by: NLaurent Vivier <laurent@vivier.eu>
Message-Id: <20180529194207.31503-16-laurent@vivier.eu>

linux-user/syscall_defs.h

@@ -418,14 +418,6 @@ struct target_sigaction;
 int do_sigaction(int sig, const struct target_sigaction *act,
                  struct target_sigaction *oact);
 
-#if defined(TARGET_I386) || defined(TARGET_ARM) || defined(TARGET_SPARC) \
-    || defined(TARGET_PPC) || defined(TARGET_MIPS) || defined(TARGET_SH4) \
-    || defined(TARGET_M68K) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) \
-    || defined(TARGET_MICROBLAZE) \
-    || defined(TARGET_S390X) || defined(TARGET_OPENRISC) \
-    || defined(TARGET_TILEGX) || defined(TARGET_HPPA) || defined(TARGET_NIOS2) \
-    || defined(TARGET_RISCV) || defined(TARGET_XTENSA)
-
 #include "target_signal.h"
 
 #ifdef TARGET_SA_RESTORER
@@ -666,8 +658,6 @@ typedef struct target_siginfo {
 #define TARGET_TRAP_BRANCH      (3)     /* process taken branch trap */
 #define TARGET_TRAP_HWBKPT      (4)     /* hardware breakpoint/watchpoint */
 
-#endif /* defined(TARGET_I386) || defined(TARGET_ARM) */
-
 struct target_rlimit {
         abi_ulong   rlim_cur;
         abi_ulong   rlim_max;