drivers/flash/flash_simulator: allow to disable statistic

So fare flash simulator had been forced to use the statistic
subsystem.

This patch introduces CONFIG_FLASH_SIMULATOR_STATS which allow to select
whether the statistic is involved in flash_simulator operations.

This patch allows to reduce flash footprint when the statistic is
not required.

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
2 files changed