Charles Keepax 0e3e799970 net: macb: Only call GPIO functions if there is a valid GPIO
GPIOlib will print warning messages if we call GPIO functions without a
valid GPIO. Change the code to avoid doing so.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-28 11:39:16 -04:00
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