Stm32 pwm f7xx update (#735)

* Update include for hal_conf in Stm32PWM.hxx.

src/freertos_drivers/st/Stm32PWM.hxx

@@ -37,17 +37,7 @@
 #include "PWM.hxx"
 #include "utils/Uninitialized.hxx"
 
-#if defined(STM32F072xB) || defined(STM32F091xC)
-#include "stm32f0xx_hal_conf.h"
-#elif defined(STM32F103xB)
-#include "stm32f1xx_hal_conf.h"
-#elif defined(STM32F303xC) || defined(STM32F303xE)
-#include "stm32f3xx_hal_conf.h"
-#elif defined(STM32L432xx)
-#include "stm32l4xx_hal_conf.h"
-#else
-#error Dont know what STM32 chip you have.
-#endif
+#include "stm32f_hal_conf.hxx"
 
 /// Set of 4 PWM channels that belong to a single timer resource in the STM32
 /// microcontrollers. Note that the different channels are tied to be using the