remoteproc: Add additional crash reasons

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
remoteproc: qcom-tz-pil: Add interrupts and gpio hooks

Add the necessary interrupt and gpio hooks to be informed about events
on the remote processor as well as being able to shut it down
gracefully.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>