move all differential pressure drivers to the same folder

cmake/configs/nuttx_aerocore2_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-v2_test.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

cmake/configs/posix_rpi_common.cmake

cmake/configs/posix_sitl_default.cmake

src/drivers/differential_pressure/CMakeLists.txt

src/drivers/differential_pressure/ets/CMakeLists.txt

src/drivers/differential_pressure/ets/ets_airspeed.cpp

src/drivers/differential_pressure/ms4525/CMakeLists.txt

src/drivers/differential_pressure/ms4525/ms4525_airspeed.cpp