feat(ti): add PSCI handlers for system suspend

Add necessary K3 PSCI handlers to enable system suspend to be reported
in the PSCI capabilities when asked during OS boot.

Additionally, have the handlers provide information that all domains
should be off and also have the power domain suspend handler invoke the
TISCI_MSG_ENTER_SLEEP message to enter system suspend.

Change-Id: I351a16167770e9909e8ca525ee0d74fa93331194
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
1 file changed