APPLIED/cmnt: [Zesty][PATCH v4 00/13] POWER9 XIVE: msgsnd/doorbell IPI support(backport)

[Kleber Souza]

Applied to zesty/master-next branch.

Patch 11/13 (powerpc/powernv: Add XIVE related definitions to
opal-api.h) didn't applied cleanly, so I did the backport and changed
the annotation from "(cherry picked from commit
eeea1a434ddedbb5aaeac1a8661445b3ae3eb539)" to "(backported from commit
eeea1a434ddedbb5aaeac1a8661445b3ae3eb539)".

Thanks.