From df386375ffa8c2262a52db64a5b6446e11896978 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Tue, 21 Apr 2015 13:14:53 -0700
Subject: [PATCH] sparc64: Use M7 PMC write on all chips T4 and onward.

They both work equally well, and the M7 implementation is
simpler and cheaper (less register writes).

With help from David Ahern.

Signed-off-by: David S. Miller <davem@davemloft.net>
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