soc: qcom: Migrate SCM calls in core hang

Migrate SCM io_read/write to upstream API in core hang detection.

Change-Id: If720dcd0f9a5341276fcd2a052c8ab6cf238aaa5
Signed-off-by: Elliot Berman <eberman@codeaurora.org>
Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>