Revert "drm/connector: Add drm_connector_find_by_fwnode() function (v3)"

This reverts commit 6e55f6a8 which is
commit 3d3f7c1e upstream.

It breaks the android ABI and if this is needed in the future, can be
brought back in an abi-safe way.

Bug: 161946584
Change-Id: Ie2f1199f85aa249f6303b4be83f22b1eb1ebff77
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>