Merge branch 'dsa-lan9303-phy_addr_sel_strap-rename-and-retype'

Egil Hjelmeland says:

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net: dsa: lan9303: phy_addr_sel_strap rename and retype

Non functional cleanups involving chip->phy_addr_sel_strap.
As promised in https://lkml.org/lkml/2017/11/6/273
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Signed-off-by: David S. Miller <davem@davemloft.net>