staging:iio:adis162** cleanup

[Valentin Rothberg]

Hi Lars-Peter,

both of your commits 88ae3aedb8ec ("staging:iio:adis16204: Remove
adis16204 driver") and 2bcdb3f2e05f ("staging:iio:adis16220: Remove
adis16220 driver") have shown up in today's linux-next.

The corresponding Kconfig options are still referenced in the __initdata
struct in arch/blackfin/mach-bf537/boards/stamp.c.  Shall I send a
trivial patch removing the two #if's or do you prefer to keep them?

I detected the issue with scripts/checkkconfigsymbols.py by diffing
yesterday's and today's linux-next.

Best regards,
 Valentin