timekeeping: Remove pointless conversion to bool

interp_forward is type bool so assignment from a logical operation directly
is sufficient.

Signed-off-by: Nicholas Mc Guire <[e-mail]>
Cc: "Christopher S. Hall" <[e-mail]>
Cc: John Stultz <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Thomas Gleixner <[e-mail]>

kernel/time/timekeeping.c

···
 		return 0;
 
 	/* Interpolate shortest distance from beginning or end of history */
-	interp_forward = partial_history_cycles > total_history_cycles/2 ?
-		true : false;
+	interp_forward = partial_history_cycles > total_history_cycles / 2;
 	partial_history_cycles = interp_forward ?
 		total_history_cycles - partial_history_cycles :
 		partial_history_cycles;