linux-kernel - untangle the <asm/siginfo.h> mess

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Date:   Sat,  3 Jun 2017 21:00:57 +0200
From:   Christoph Hellwig <hch@....de>
To:     Arnd Bergmann <arnd@...db.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>
Cc:     linux-arch@...r.kernel.org, sparclinux@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: untangle the <asm/siginfo.h> mess

We currently have uapi versions of <asm/siginfo.h> which at least on a few
architectures define bits of the userspace ABI before including an uapi
asm-generic version, and also non-uapi versions which do almost nothing
except for making sure other headers include the right uapi one before
including an asm-generic that defined two prototypes and a few defines
that aren't architecture specific in any.

This series completely gets rid of the non-uapi versions and cleans up
various small bits on the way.

Note that Thomas has some posix-timers work overlapping with this, so
it might make sense to take these through the tip tree.