Merge pull request #10458 from MichelRottleuthner/pr_driver_sds011

drivers/Makefile.dep

drivers/Makefile.include

drivers/include/saul.h

drivers/include/sds011.h

drivers/saul/saul_str.c

drivers/sds011/Makefile

drivers/sds011/include/sds011_internal.h

drivers/sds011/include/sds011_params.h

drivers/sds011/sds011.c

drivers/sds011/sds011_saul.c

sys/auto_init/auto_init.c

sys/auto_init/saul/auto_init_sds011.c

sys/include/phydat.h

sys/phydat/phydat_str.c

tests/driver_sds011/Makefile

tests/driver_sds011/main.c