ARM: mvebu: add SMP support in the Armada 375 device tree

ARM: mvebu: add SMP support in the Armada 375 device tree

Improve the Armada 375 Device Tree to add the CPU reset Device Tree
node and declare the enabling method for CPUs, both of which are
necessary to get SMP working.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Link: https://lkml.kernel.org/r/1397483648-26611-11-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1397483648-26611-11-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>