CEC-CLOCK Everest GA2 Support

[rajez133]

1. New FAPI Attribute (SYSTEM target)
   • to indicate one clock is deconfgiured by hostboot
   • 0 = No clock is deconfigured
   • 1 = Clock-A deconfigured
   • 2 = Clock-B deconfigured
2. update_hw_model chage
   • read above attribute and set clock functional state.
3. libek change: (may need similiar change in hostboot sbei)
   • current behaviour. any clock failure will lead to planar callout and proc deconfigure.
   • New behaviour:
     * check CP_REFCLOCK_SELECT and callout planar and deconfigure the proc if already redundancy is not there.
     * If redundancy is there
     * deconfgiure the clock target.
     * this should be informational log.
4. Add new behaviour for clock status check failure at istep 0.6
   • Current behaviour: Simply fail the IPL on clock status check failure.
   • New behaviour:
     * check CP_REFCLOCK_SELECT and callout planar and fail the IPL if already redundancy is not there.
     * If redundancy is there
     * deconfgiure the clock target.
     * this should be informational log.