arm64: dts: juno: add SCPI power domains for device power management

This patch adds power domain information to coresight devices using
SCPI power domains.

Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>