timer: Do not require CPUSETS to be enabled for migration

Do not require CPUSETS to be enabled to allow migration of timers and
hrtimers.

Change-Id: I898bde98cdc205f865226811efd8d45a406f2547
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
[rameezmustafa@codeaurora.org: Port to msm-4.9]
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>