Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Make sure to skip attaching disabled I2C devices. This can happen on
hardware which include a common parent block in their device trees and
only enable the components that were actually implemented,

Make sure to skip attaching disabled I2C devices. This can happen on
hardware which include a common parent block in their device trees and
only enable the components that were actually implemented, as seen on
e.g. the NanoPi R4S.

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Register mviic(4) in the I2C framework.

ok kettenis@

Add mviic(4), a driver to support the I2C controller on the
Armada 3700 SoC.

With feedback from and ok kettenis@