sensor: lsm6dsl: Update DTS support

Now that we can support the same compatible but different bus types,
update the LSM6DSL support to utilize the same compatible for either I2C
or SPI.  We rename the i2c binding file to st,lsm6dsl-i2c.yaml just to
be a bit more clear.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
4 files changed