Revert "mtd: hyperbus: hbmc-am654: fix an OF node reference leak"

This reverts commit 6f3c167d which is
commit bf582190 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: Ibe05529fa7e829affab4d721302477eea07fa66c
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>