configs: stm32f746-disco: enable MISC/DM_RESET/STM32_RESET and STM32_RCC

This allows to add rcc MFD support to stm32f746-disco board
This rcc MFD driver manages clock and reset for STM32 SoCs family

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Vikas Manocha <vikas.manocha@st.com>
1 file changed