cpufreq: interactive: fix memory leak

cpufreq: interactive: fix memory leak

Memory leak from "above_hispeed_delay" and "target_loads" can occur if
cpu exit is called after sysfs write. This change fixes the leak by
freeing the 2 allocated arrays upon CPUFREQ_GOV_POLICY_EXIT.

Bug 200053544

Change-Id: If5612f58b0f92d777bea234cdc350a539d6c2c45
Signed-off-by: Mark Kuo <mkuo@nvidia.com>
Reviewed-on: http://git-master/r/654639
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Shridhar Rasal <srasal@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: Bharat Nihalani <bnihalani@nvidia.com>