msm: subsystem_restart: Change the error ready log message

The error services interrupt log message appears as if it is
reporting an error. So, change it so that it does not appear so.

Change-Id: I84049af9d369d1c87547225813ec6cf1c4a66db5
Signed-off-by: Seemanta Dutta <seemanta@codeaurora.org>
msm: subsystem_restart: Correct state transition even in absence of PIL

In case the subsystem does not use the PIL framework, make sure
that when subsystem_get() is called, the state of the subsystem
is transitioned to SUBSYSTEM_ONLINE before returning success from
that API. Otherwise, the state would remain initialized to
SUBSYSTEM_OFFLINE even though the subsystem is up and running.

Change-Id: I4e608a2d9f9463c1b7d173080e1fcb4b98dc7083
Signed-off-by: Seemanta Dutta <seemanta@codeaurora.org>