Revert "i2c: add fwnode APIs"

This reverts commit fb6c5321 which is
commit 373c612d upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I0e1a13b40f64febc9b6b10b6a32233e8e35c57d5
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>