Revert "soc: mediatek: mtk-devapc: Fix leaking IO map on driver remove"

This reverts commit c113bccf which is
commit c9c0036c upstream.

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

Bug: 161946584
Change-Id: I9bb6b6a9a2dcbafa4ee53cdd492e5e3a02556ed5
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>