/* PA15 (RC_06) > PB12 (BEEP) */
Using timer(TIM6) to motoring "tone alarm output pin(RC_06,PA15)" and sync it's pin state to beeper output pin(BEEP, PB12), so we don't need to add another beeper on (RC_06, PA15), and remove (RC_06, PA15) for PWM output if "GPIO_TONE_ALARM" is defined.

Signed-off-by: cctsao1008 <chiacheng.tsao@gmail.com>