Allowing oneshot125 functionality to work on a Naze board.

This code has been flight tested, but will have problems on a CC3D board, and also when the looptime is longer than 8200 uS.

src/main/drivers/pwm_mapping.h

@@ -34,6 +34,7 @@
 #define MAX_INPUTS  8
 
 #define PWM_TIMER_MHZ 1
+#define ONESHOT125_TIMER_MHZ 8
 
 typedef struct drv_pwm_config_t {
     bool useParallelPWM;