Refactor to store the initial governor state when gamemode is entered

Rather than when gamemoded is started. As see in Issue #52.

	A small refactor here to ensure things stay consistent, especially
	to stop storing a pointer from get_gov_state that might have had
	it's memory changed at some point, confusingly.

daemon/governors.h

@@ -33,16 +33,6 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #include <stdbool.h>
 
-/**
- * Store initial governor so we can use it again
- */
-void update_initial_gov_state(void);
-
-/**
- * Return the governer set in update_initial_gov_state
- */
-const char *get_initial_governor(void);
-
 /**
  * Update all governors to the given value. If this is NULL, restore the
  * initial governor.