pkg/semtech-loramac: adapt to v4.4.1

pkg/semtech-loramac/Makefile

pkg/semtech-loramac/Makefile.loramac

pkg/semtech-loramac/Makefile.loramac_arch

pkg/semtech-loramac/Makefile.loramac_crypto

pkg/semtech-loramac/Makefile.loramac_mac

pkg/semtech-loramac/Makefile.loramac_region

pkg/semtech-loramac/contrib/Makefile

pkg/semtech-loramac/contrib/semtech_loramac.c

pkg/semtech-loramac/contrib/semtech_loramac_getset.c

pkg/semtech-loramac/contrib/semtech_loramac_radio.c

pkg/semtech-loramac/contrib/semtech_loramac_timer.c

pkg/semtech-loramac/include/semtech-loramac/board.h

pkg/semtech-loramac/include/semtech_loramac.h

pkg/semtech-loramac/patches/0001-adapt-for-RIOT.patch

pkg/semtech-loramac/patches/0001-adapt-to-riot.patch

...emtech-loramac/patches/0002-adapt-utilities-to-riot.patch

pkg/semtech-loramac/patches/0002-eu868-join-retries.patch

...ech-loramac/patches/0004-fix-uninitialized-variable.patch