tools/include: Sync uapi/asm-generic/unistd.h with the kernel sources

tools/include: Sync uapi/asm-generic/unistd.h with the kernel sources

And arch syscall tables to pick up changes from:

  b1e31c134a8a powerpc: restore some missing spu syscalls
  d3882564a77c syscalls: fix compat_sys_io_pgetevents_time64 usage
  54233a425403 uretprobe: change syscall number, again
  63ded110979b uprobe: Change uretprobe syscall scope and number
  9142be9e6443 x86/syscall: Mark exit[_group] syscall handlers __noreturn
  9aae1baa1c5d x86, arm: Add missing license tag to syscall tables files
  5c28424e9a34 syscalls: Fix to add sys_uretprobe to syscall.tbl
  190fec72df4a uprobe: Wire up uretprobe system call

This should be used to beautify syscall arguments and it addresses
these tools/perf build warnings:

  Warning: Kernel ABI header differences:
  diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
  diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
  diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
  diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl

Please see tools/include/uapi/README for details (it's in the first patch
of this series).

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch@vger.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>