soc: qcom: core_hang: Eliminate use of incorrect values in sysfs

The values of the registers that control whether core hang
detection is enabled or not, and what threshold values are
used is programmed early in the boot sequence. Directly
read from these registers when querying their values,
to avoid reporting incorrect values from data structures
that are not initialized at the time these registers
are configured.

Change-Id: I1939a6b570251bd12d4dc8689ef20d77d7fa9d47
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>