Merge branch 'nfc-llcp-cleanups'

Krzysztof Kozlowski says:

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nfc: llcp: few cleanups/improvements

These are improvements, not fixing any experienced issue, just looking correct
to me from the code point of view.

Changes since v1
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1. Split from the fix.

Testing
=======
Under QEMU only. The NFC/LLCP code was not really tested on a device.
====================

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