ARM: mvebu: defconfig: enable cpuidle support in mvebu_v7_defconfig

The Marvell EBU SoCs such as Armada 370, Armada XP or Armada 38x now
support cpuidle, so this commit enables the appropriate Kconfig
options in mvebu_v7_defconfig.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1404913221-17343-18-git-send-email-thomas.petazzoni@free-electrons.com


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