perf s390: Move syscall.tbl check into check-headers.sh

It is better to check syscall.tbl for s390 in check-headers.sh, it is
similar with commit c9b51a01 ("perf tools: Move syscall_64.tbl check
into check-headers.sh").
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Xuefeng Li <lixuefeng@loongson.cn>
Link: http://lore.kernel.org/lkml/1608278364-6733-3-git-send-email-yangtiezhu@loongson.cnSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/arch/s390/Makefile

@@ -12,7 +12,6 @@ PERF_HAVE_JITDUMP := 1
 
 out    := $(OUTPUT)arch/s390/include/generated/asm
 header := $(out)/syscalls_64.c
-syskrn := $(srctree)/arch/s390/kernel/syscalls/syscall.tbl
 sysprf := $(srctree)/tools/perf/arch/s390/entry/syscalls
 sysdef := $(sysprf)/syscall.tbl
 systbl := $(sysprf)/mksyscalltbl
@@ -21,9 +20,6 @@ systbl := $(sysprf)/mksyscalltbl
 _dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)')
 
 $(header): $(sysdef) $(systbl)
-	@(test -d ../../kernel -a -d ../../tools -a -d ../perf && ( \
-        (diff -B $(sysdef) $(syskrn) >/dev/null) \
-        || echo "Warning: Kernel ABI header at '$(sysdef)' differs from latest version at '$(syskrn)'" >&2 )) || true
 	$(Q)$(SHELL) '$(systbl)' $(sysdef) > $@
 
 clean::

tools/perf/check-headers.sh

@@ -145,6 +145,7 @@ check arch/x86/lib/insn.c             '-I "^#include [\"<]\(../include/\)*asm/in
 # diff non-symmetric files
 check_2 tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
 check_2 tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
+check_2 tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
 
 for i in $BEAUTY_FILES; do
   beauty_check $i -B