riscv: refactor the IPI code

This prepares for adding native non-SBI IPI code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
This commit is contained in:
Christoph Hellwig 2019-08-21 23:58:32 +09:00 • committed by Paul Walmsley
commit 7e0e50895f