ARM: dts: kirkwood: Fix polarity of GPIO fan lines

ARM: dts: kirkwood: Fix polarity of GPIO fan lines

These two lines are active high, not active low. The bug was
found when we changed the kernel to respect the polarity defined
in the device tree.

Fixes: 1b90e06b1429 ("ARM: kirkwood: Use devicetree to define DNS-32[05] fan")
Cc: Jamie Lentin <[email protected]>
Cc: Guenter Roeck <[email protected]>
Cc: Jason Cooper <[email protected]>
Cc: Andrew Lunn <[email protected]>
Cc: Gregory Clement <[email protected]>
Cc: Sebastian Hesselbarth <[email protected]>
Cc: Julien D'Ascenzio <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Tested-by: Jamie Lentin <[email protected]>
Reported-by: Julien D'Ascenzio <[email protected]>
Tested-by: Julien D'Ascenzio <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Signed-off-by: Gregory CLEMENT <[email protected]>