msm: thermal: Retry on failure to hotplug

Add support in thermal driver to retry hotplug
request on failure to fulfill the request.

This retrying will be disabled when the device
enters suspend and will resume after the device
exits from suspend.

Change-Id: I9e2c305754465eb458566c0224804c5ad4bda240
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>