powerpc: add interrupt wrapper entry / exit stub functions

These will be used by subsequent patches.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210130130852.2952424-28-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2021-01-30 23:08:37 +10:00 • committed by Michael Ellerman
commit 25b7e6bb74