commit 18ab7db6 upstream.

Suspend init function must be marked as __init, since it is not needed
after the kernel has booted. This patch moves the cpu_suspend_init()
function to the __init section.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
[ luis: 3.16-stable prereq for
  f43c2718 "arm64: kernel: fix __cpu_suspend mm switch on warm-boot" ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>