Added more APIs for ARM SCMI clock management protocol.
- scmi_clock_rate_set
- scmi_clock_parent_get
- scmi_clock_parent_set
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
This includes:
1) Source containing helper functions, each
implementing a command from the clock management
protocol.
2) A clock controller driver making use of said
helper functions and implementing the clock
subsystem API.
3) A DT binding for clock protocol node.
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>