git: cputimer: Update comment

[Sepherosa Ziehau]

commit 9800d437a2ae318513b1e581f46ca3ef79b67bfd
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Wed Jan 25 17:19:38 2017 +0800

    cputimer: Update comment

Summary of changes:
 sys/sys/systimer.h | 32 ++++++++++++++++++++++----------
 1 file changed, 22 insertions(+), 10 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/9800d437a2ae318513b1e581f46ca3ef79b67bfd


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