LAN9514 GPIO driver improperly handles direction setting

[evgeny-boger]

Steps to reproduce:

root@wirenboard:~# cat /sys/class/gpio/gpio247/direction 
out
root@wirenboard:~# echo 1 > /sys/class/gpio/gpio247/value 
root@wirenboard:~# cat /sys/class/gpio/gpio247/value
1
root@wirenboard:~# echo out > /sys/class/gpio/gpio247/direction
root@wirenboard:~# cat /sys/class/gpio/gpio247/value
0

Setting direction resets GPIO value.