Bluetooth: Mesh: Fix checking for subnet when recovering App Key
Bluetooth: Mesh: Fix checking for subnet when recovering App Key

The ordering of items in flash is not guaranteed, so it's possible we
get an App Key before the corresponding Net Key. Remove the check for
a Net Key, since the storing code should never store an App Key if
there is no corresponding Net Key.

Fixes #9670

Signed-off-by: Johan Hedberg <628991c7b0a19c384f9b99c21ec330ce952bb838@intel.com>

galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,explora26/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,galak/zephyr,kraj/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,explora26/zephyr,Vudentz/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,explora26/zephyr,nashif/zephyr,finikorg/zephyr,Vudentz/zephyr,ldts/zephyr,punitvara/zephyr,explora26/zephyr,galak/zephyr,punitvara/zephyr,kraj/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,finikorg/zephyr,ldts/zephyr,nashif/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,Vudentz/zephyr,nashif/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,Vudentz/zephyr,finikorg/zephyr,punitvara/zephyr,ldts/zephyr,finikorg/zephyr,explora26/zephyr