By default, a media driver auto-selects all possible i2c
devices that are used by any of the supported devices.

This is generally the right thing to do, except when there
are strict constraints with regards to the kernel size,
like on embedded systems.

Use this option with care, as deselecting ancillary drivers which
are, in fact, necessary will result in the lack of the needed
functionality for your device (it may not tune or may not have
the need demodulers).

If unsure say Y.