ti: k3: common: Enable ARM cluster power down

When all cores in a cluster are powered down the parent cluster can
be also powered down. When the last core has requested powering down
follow by sending the cluster power down sequence to the system
power controller firmware.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Change-Id: I0ffeb339852c66ef62743aecd3e17ca20bad6216
3 files changed