test/bmx280: New integration to generic BMX280 sensors tests

[CW-75]

Contribution description

This pr add supports to BMP280 sensors in the new driver_bmx280. Was modified the driver_bme280 folder to gives a generic name as driver_bmx280. Take careful with the I2c address used in both models, because bmp could be 0x77 too. In this case took the 0x76. Also when it's ran the test, the bmp280 has not support to read humidity in difference with the bme280, so in the test was added a pre-build conditional to knows what type of driver will be running.

Testing procedure

When you are running a BMP driver you need to specify before the build the test code

 make flash term DRIVER=bmp280_i2c

Note : if you don't specify the driver, by default will be loaded the bme_i2c

Issues/PRs references

Fixes #326

[luisan00]

Good job 👏