STM32F4xx drivers missing macro

Dear,

It's not a bug but I think there is a missing macro in "stm32f4xx_ll_adc.h" file of the STM32F4xx drivers version 1.25.0

There is a reference to the "__LL_ADC_CALC_VREFANALOG_VOLTAGE" helper macro to calculate the analog voltage reference but this macro isn't available.

It's easy to calculate this value because all the needed values are available in the file to calculate the reference voltage value (VREFINT_CAL_ADDR and VREFINT_CAL_VREF).

But this macro is available in other STM32 drivers (as STM32F0xx per exemple).