move all magnetometers to the same folder

cmake/configs/nuttx_aerocore2_default.cmake

cmake/configs/nuttx_aerofc-v1_default.cmake

cmake/configs/nuttx_auav-x21_default.cmake

cmake/configs/nuttx_mindpx-v2_default.cmake

cmake/configs/nuttx_nxphlite-v3_default.cmake

cmake/configs/nuttx_px4-same70xplained-v1_default.cmake

cmake/configs/nuttx_px4fmu-v2_default.cmake

cmake/configs/nuttx_px4fmu-v3_default.cmake

cmake/configs/nuttx_px4fmu-v4_default.cmake

cmake/configs/nuttx_px4fmu-v4pro_default.cmake

cmake/configs/nuttx_px4fmu-v5_default.cmake

cmake/configs/nuttx_px4nucleoF767ZI-v1_default.cmake

cmake/configs/nuttx_tap-v1_default.cmake

src/drivers/boards/px4fmu-v4/board_config.h

src/drivers/magnetometer/CMakeLists.txt

src/drivers/magnetometer/bmm150/CMakeLists.txt

src/drivers/magnetometer/bmm150/bmm150.cpp

src/drivers/magnetometer/bmm150/bmm150.hpp

src/drivers/magnetometer/hmc5883/CMakeLists.txt

src/drivers/magnetometer/hmc5883/hmc5883.cpp