soc: neorv32: only allow reading frequency at runtime with a system clock

CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME depends on
CONFIG_SYS_CLOCK_EXISTS, so CONFIG_SOC_NEORV32_READ_FREQUENCY_AT_RUNTIME
needs to depend on CONFIG_SYS_CLOCK_EXISTS for selecting it.

Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>
1 file changed