add Sveon STV21 stick to device list

Signed-off-by: Steve Markgraf <steve@steve-m.de>
tuner_r82xx: enable multi-byte I2C transfers

This should speed some multi register reads up a bit.

Signed-off-by: Steve Markgraf <steve@steve-m.de>
cmake: detect libusb on FreeBSD

Source:
http://patch-tracker.debian.org/patch/series/view/rtl-sdr/0.5.0.4.4914-2/libusb-freebsd

Signed-off-by: Steve Markgraf <steve@steve-m.de>
rtl_fm/power: unbreak MinGW build

Signed-off-by: Steve Markgraf <steve@steve-m.de>
rtl_eeprom: add note regarding necessary replug of device

Signed-off-by: Steve Markgraf <steve@steve-m.de>
rtl_test: use static instead of global var

Signed-off-by: Steve Markgraf <steve@steve-m.de>
lib: use FIR coefficients instead of magic + documentation

Signed-off-by: Steve Markgraf <steve@steve-m.de>
Merge git://git.osmocom.org/rtl-sdr