With the canned recipe for flashing, flash dependencies should be
added to FLASHDEPS, instead of writing `flash: dependencies`. This
ensures that both flash and flash-only depend on the same prerequisites.

drivers/periph_eeprom: add clear and erase functions

shell_commands/ifconfig: mark TENTATIVE addresses correctly

dist/testbed-support: add firefly in IoT-LAB archis

sys: add riotboot_hdr module

cpu/esp32: fix of adc_res_t

boards/nrf51dk: add initial support

Unittest for riotboot_hdr submodule. If successful, it must
print 4 successful tests.

riotboot_hdr enables to partition the internal flash memory
into "slots", each one with a header providing information
about the partition. The concept for now is limited to
firmware partitions, which are recognised by the riotboot
bootloader. In the future the concept might be extended to
represent other content.

Co-authored-by: Kaspar Schleiser <kaspar@schleiser.de>

kw2xrf: Don't use netdev_ieee802154_t for channel

tests: adapt embunit TEST_ASSERT_EQUAL_STRING

crypto: Poly1305 implementation

board/*/flash.sh: get file to flash from command line

boards/sodaq-sara-aff: Initial support

jlink: get flash and debug files from cli

drivers: sht3x temperature and humidity sensor

This modification changes the netdev::set function for the kw2xrf to not
propagate the NETOPT_CHANNEL to the generic netdev_ieee802154 code

board: NXP Kinetis USB-KW41Z IoT USB dongle

Tests are based on the tests vectors provided in RFC 7539

poly1305 implementation strongly based on
https://github.com/floodyberry/poly1305-donna

kinetis: LPUART: Compute oversampling rate at init

usb-kw41z: improve doc and sort module dependencies