mgmt: fmfu: Hide MGMT_FMFU logging options when not enabled

When building an application we don't want
CONFIG_MGMT_FMFU_LOG_LEVEL_DEFAULT to turn up in the generated
.config file unless CONFIG_MGMT_FMFU is enabled.

Signed-off-by: Rubin Gerritsen <rubin.gerritsen@nordicsemi.no>

Author: rugeGerritsen

subsys/mgmt/fmfu/Kconfig

@@ -12,8 +12,12 @@ config MGMT_FMFU
 	depends on MCUMGR
 	depends on NRF_MODEM_LIB
 
+if MGMT_FMFU
+
 module=MGMT_FMFU
 module-dep=LOG
 module-str=FMFU
 source "${ZEPHYR_BASE}/subsys/logging/Kconfig.template.log_config"
+
+endif
 endmenu