powerpc/fadump: define OPAL register/un-register callback functions

Make OPAL calls to register and un-register with firmware for MPIPL.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/156821348482.5656.13646250851483648241.stgit@hbathini.in.ibm.com
This commit is contained in:
Hari Bathini 2019-09-11 20:21:33 +05:30 • committed by Michael Ellerman
commit a20a8fa42d