module/scmi_pinctrl_bug_fixing: Fix the following bugs
- Add pinctrl_drv mock driver.
- Update message_attribute command.
- Solve scmi_pin_control bug in list_association.
- Solve scmi_pin_control bug in get_setting.
- Remove unimplemented protocols from scmi_pin_control.
- Update scmi_pin_control payload size table.
- Update the scmi_validation check to ignore variable length payload messages.
- Update the MOD_PIN_CONTROL_API to MOD_PINCTRL_API_IDX.
Signed-off-by: Khaled Ali Ahmed khaled.aliahmed@arm.com