Incorrect usage of 'Val instead of 'Enum_Val

[liampwll]

The below line will raise a Constraint_Error if Range_Check is enabled as the enumeration is not continuous, using 'Enum_Val instead would fix this. This error could exist in the other uses of 'Val which I have not checked and it could have potentially worse consequences than this one which will likely be harmless when Range_Check is disabled.

Ada_Drivers_Library/arch/ARM/STM32/drivers/stm32-adc.adb

Line 410 in b651d01

if Multi_ADC_Mode_Selections'Val (C_ADC_Periph.CCR.MULT) = Independent