HAL_ChibiOS: switch MatekF765 to timer 12

fixes PWM 5 and 6

libraries/AP_HAL_ChibiOS/hwdef/MatekF765-Wing/hwdef.dat

@@ -27,7 +27,7 @@ FLASH_RESERVE_START_KB 96
 # board voltage
 STM32_VDD 330U
 
-STM32_ST_USE_TIMER 3
+STM32_ST_USE_TIMER 12
 define CH_CFG_ST_RESOLUTION 16
 
 # two I2C bus
@@ -123,7 +123,7 @@ PD0 UART4_RX UART4 NODMA
 # PB8 UART5_RX UART5 NODMA
 
 # USART6 (RC input)
-PC7 TIM8_CH2 TIM8 RCININT FLOAT LOW
+PC7 TIM3_CH2 TIM3 RCININT FLOAT LOW
 PC6 USART6_TX USART6 NODMA LOW
 
 # UART7 (telem1)
@@ -145,8 +145,8 @@ PA0 TIM2_CH1 TIM2 PWM(1) GPIO(50)
 PA1 TIM2_CH2 TIM2 PWM(2) GPIO(51)
 PA2 TIM5_CH3 TIM5 PWM(3) GPIO(52)
 PA3 TIM5_CH4 TIM5 PWM(4) GPIO(53)
-PB0 TIM1_CH2N TIM1 PWM(5) GPIO(54)
-PB1 TIM1_CH3N TIM1 PWM(6) GPIO(55)
+PB0 TIM8_CH2N TIM8 PWM(5) GPIO(54)
+PB1 TIM8_CH3N TIM8 PWM(6) GPIO(55)
 PD12 TIM4_CH1 TIM4 PWM(7) GPIO(56)
 PD13 TIM4_CH2 TIM4 PWM(8) GPIO(57)
 PD14 TIM4_CH3 TIM4 PWM(9) GPIO(58)