consolidate a few more arch support config options
From: Christoph Hellwig <hch@lst.de>
Date: 2019-02-13 17:41:18
Also in:
linux-kbuild, linux-riscv, linux-s390, lkml
Hi all, this series moves various config options that are defined in multiple arch Kconfig files into common files, usually close to the code supporting such features.