soc: qcom: ssr: add crash status to know why subsys crashed

In some specific cases, clients may want to know why subsystem
crashed, for example, in case of watch dog bite, subsystem may not
be able to execute error handling. Which would need different code
paths to be exercised on the apps processor.

Change-Id: I073733b8a56b57f14906b25cba08012c2f0b414a
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>