The DHT20 sensor is a temperature and humidity sensor that uses I2C to
communicate with a microcontroller. The DHT20 sensor is Aosong.
use standard crc
update description to add reference to AHT20 and AM2301B
clean code, use defines and bit manipulation
add dht20 to i2c test suite for build tests
update bit manipulation
use more defines instead of raw numbers
add bindings to allow aht20 or am2301b to be used in devicetree
in all 3 cases, the same dht20.c driver is compiled
Signed-off-by: Nathan Olff <nathan@kickmaker.net>
