[nuttx] stm32f33xxx: rcc config: add missing flash latency configuration [1 Attachment]

[Gwenhael Goavec-Merou [e-mail] [nuttx]]

Hi,

Flash latency must be fixed according to sysclk frequency. If this operation
is not done or done after PLL configuration, the STM32 fail to continue boot
operation if the frequency if greater than 24MHz.

This patch add this operation according to the board variable
STM32_SYSCLK_FREQUENCY.

Tested on stm32f334-disco board.

Gwenhael Goavec-Merou