board:Set larger stack margin

boards/airmind/mindpx-v2/nuttx-config/nsh/defconfig

boards/auav/x21/nuttx-config/nsh/defconfig

boards/av/x-v1/nuttx-config/nsh/defconfig

boards/bitcraze/crazyflie/nuttx-config/nsh/defconfig

boards/intel/aerofc-v1/nuttx-config/nsh/defconfig

boards/omnibus/f4sd/nuttx-config/nsh/defconfig

boards/px4/fmu-v2/nuttx-config/nsh/defconfig

boards/px4/fmu-v3/nuttx-config/nsh/defconfig

boards/px4/fmu-v3/nuttx-config/stackcheck/defconfig

boards/px4/fmu-v4/nuttx-config/nsh/defconfig

boards/px4/fmu-v4/nuttx-config/stackcheck/defconfig

boards/px4/fmu-v4pro/nuttx-config/nsh/defconfig

boards/px4/fmu-v5/nuttx-config/nsh/defconfig