common: Change  minfreq to 499.2Mhz during display off scenario.

        1.Changes to set CPU0 min freq for 8952 target as below:.
          Display off case :  set to  499.2Mhz
          Display on case  :  set to  960Mhz.
        2.Changes to set CPU0 and CPU4 interactive timer rate values
          Display off cases : Set cpu0 and cpu4 to 50ms.

Change-Id: I833da462ab4db033a33051ed9499ea75b13f5d9f
3 files changed