ARM: mvebu: add gpio-fan to mvebu_v7_defconfig

Since one of the platforms (Armada 370 RD) is now using the gpio-fan
driver, it makes sense to enable it in mvebu_v7_defconfig.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lkml.kernel.org/r/1410429419-29820-5-git-send-email-thomas.petazzoni@free-electrons.com


Signed-off-by: Jason Cooper <jason@lakedaemon.net>