pci/hotplug/pnv-php: Improve error msg on power state change failure

[ Upstream commit 323c2a26ff43500a96799250330fab68903d776f ]

When changing the slot state, if opal hits an error and tells as such
in the asynchronous reply, the warning "Wrong msg" is logged, which is
rather confusing. Instead we can reuse the better message which is
already used when we couldn't submit the asynchronous opal request
initially.

Reviewed-by: Alastair D'Silva <alastair@d-silva.org>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191121134918.7155-8-fbarrat@linux.ibm.com


Stable-dep-of: 466861909255 ("PCI: pnv_php: Clean up allocated IRQs on unplug")
Signed-off-by: Sasha Levin <sashal@kernel.org>