npcx/fan: Fix mft_set_apb1_prescaler description
This fixes the description of mft_set_apb1_prescaler().
BRANCH=none
TEST=buildall passes
@@ -144,7 +144,7 @@ static int mft_fan_rpm(int ch)
/**
* Set fan prescaler based on apb1 clock
*
- * @param none
+ * @param ch operation channel
* @return none
* @notes changed when initial or HOOK_FREQ_CHANGE command
*/
