Merge branch 'hdlc_ppp-cleanups'

Guangbin Huang says:

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net: hdlc_ppp: clean up some code style issues

This patchset clean up some code style issues.

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Change Log：
V1 -> V2:
1. remove patch "net: hdlc_ppp: fix the comments style issue" and
patch "net: hdlc_ppp: remove redundant spaces" from this patchset.
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Signed-off-by: David S. Miller <davem@davemloft.net>