Adding px4fmu-v4pro

Images/px4fmu-v4pro.prototype

ROMFS/px4fmu_common/init.d/rc.sensors

cmake/configs/nuttx_px4fmu-v4pro_default.cmake

nuttx-configs/px4fmu-v4pro/Kconfig

nuttx-configs/px4fmu-v4pro/include/board.h

nuttx-configs/px4fmu-v4pro/include/nsh_romfsimg.h

nuttx-configs/px4fmu-v4pro/nsh/Make.defs

nuttx-configs/px4fmu-v4pro/nsh/defconfig

nuttx-configs/px4fmu-v4pro/nsh/setenv.sh

nuttx-configs/px4fmu-v4pro/scripts/ld.script

nuttx-configs/px4fmu-v4pro/src/Makefile

nuttx-configs/px4fmu-v4pro/src/empty.c

src/drivers/boards/px4fmu-v4pro/CMakeLists.txt

src/drivers/boards/px4fmu-v4pro/board_config.h

src/drivers/boards/px4fmu-v4pro/px4fmu_can.c

src/drivers/boards/px4fmu-v4pro/px4fmu_init.c

src/drivers/boards/px4fmu-v4pro/px4fmu_led.c

src/drivers/boards/px4fmu-v4pro/px4fmu_spi.c

src/drivers/boards/px4fmu-v4pro/px4fmu_timer_config.c

src/drivers/boards/px4fmu-v4pro/px4fmu_usb.c