msm:subsystem_restart:Restart device when SSR phase one is invoked

When subsystem restart is called and the restart level is one the device
will reboot. It was earlier set up to just print out a warning message.

Change-Id: I7a652d64d71bbd7ab8de33e97c01bf3c4c2c7e4b
Signed-off-by: Ameya Thakur <ameyat@codeaurora.org>