b200: removed header redundancy interface
b200: max spp limit at full rate stb
x300: support for 16 bit eeproms

Conflicts:
	host/include/uhd/types/serial.hpp
	host/lib/usrp/b250/b250_impl.cpp
	host/lib/usrp/mboard_eeprom.cpp
uhd: allow for 16 bit i2c and eeprom addrs

Conflicts:
	host/lib/usrp/b250/b250_dboard_iface.cpp
	host/lib/usrp/cores/i2c_core_100_wb32.cpp
uhd: improvements to rx samples to file