generic: fix statx definition for non-x86 architecture

Fix a compilation error for ARM:
__ILP32__ is defined but not __X32_SYSCALL_BIT.

The check should only apply for x86_64 architecture, statx for other
architectures is not implemented yet - see commit 7acc839c9e57
"statx: Add a system call to make enhanced file info available".

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
1 file changed