cpuidle: lpm_levels: Replace remote spinlock

Remove deprecated remote spinlock usage, added changes to write
the tid value into mutex lock register.

Change-Id: I031566b4038df53a99306c34db427c5929d68483
Signed-off-by: Hari babu <haribabu@codeaurora.org>
Signed-off-by: Sivasri Kumar Vanka <sivasri@codeaurora.org>
Signed-off-by: Haribabu Gattem <haribabu@codeaurora.org>