cpuidle: psci: Extend information in log about OSI/PC mode

cpuidle: psci: Extend information in log about OSI/PC mode

[ Upstream commit 668057b07db069daac3ca4e4978f8373db9cb71c ]

It's useful to understand whether we are using OS-initiated (OSI) mode or
Platform Coordinated (PC) mode, when initializing the CPU PM domains.
Therefore, let's extend the print in the log after a successful probe with
this information.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Sudeep Holla <sudeep.holla@arm.com
Acked-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Stable-dep-of: 12acb348fa45 ("cpuidle: psci: Move enabling OSI mode after power domains creation")
Signed-off-by: Sasha Levin <sashal@kernel.org>