soc/arm: st_stm32: Optionally Set SYS_CLOCK_HW_CYCLES_PER_SEC using dt

Optionally configure Kconfig SYS_CLOCK_HW_CYCLES_PER_SEC using
clock-frequency provided by dt if sysclk node is enabled

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
1 file changed