powersuspend: add power_suspended_active boolean for global access

Some routines just need the boolean for whether powersuspend is active or not.

Rather than hooking to the powersuspend on every occasions,
add power_suspended boolean for global access.

Based on commit: https://github.com/halaszk/Perseus-halaszk-universal5433/commit/0d982b32f906b827117f0156d260f8ff095b1356