mgmt: mcumgr: fs_mgmt: Update hash/checksum supported command
mgmt: mcumgr: fs_mgmt: Update hash/checksum supported command

Updates the hash/checksum supported command to use the new command
structure.

Signed-off-by: Jamie McCrae <7c977670495befe33b67661379bf81cc6b3660ab@nordicsemi.no>

zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr