Revert "i3c: dw: Add hot-join support."

This reverts commit c30508bb which is
commit 1d083260 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: I0400b9a254c49a129b45b871aa6d998e47174792
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>