perf arch powerpc: Sync powerpc syscall.tbl

Copy over powerpc syscall.tbl to grab changes from the below commits:

  commit cee3536d ("powerpc: Wire up clone3 syscall")
  commit 1a271a68 ("arch: mark syscall number 435 reserved for clone3")
  commit 7615d9e1 ("arch: wire-up pidfd_open()")
  commit d8076bdb ("uapi: Wire up the mount API syscalls on non-x86 arches [ver #2]")
  commit 39036cd2 ("arch: add pidfd and io_uring syscalls everywhere")
  commit 48166e6e ("y2038: add 64-bit time_t syscalls to all 32-bit architectures")
  commit d33c577c ("y2038: rename old time and utime syscalls")
  commit 00bf25d6 ("y2038: use time32 syscall names on 32-bit")
  commit 8dabe724 ("y2038: syscalls: rename y2038 compat syscalls")
  commit 0d6040d4

 ("arch: add split IPC system calls where needed")

Reported-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/20190827071458.19897-1-naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>