This adds emulation support for the following integer instructions:
  * Modulo Signed Word (modsw)
  * Modulo Unsigned Word (moduw)
Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>