soc: qcom: llcc: Fix to read LLCC status register

Fix to make LLCC driver read the status register for active/inactive
state instead of writing to the register.

Change-Id: I9635494566ba7e4caa7ad1fb8931dbdf658bebfe
Signed-off-by: Kyle Yan <kyan@codeaurora.org>
Signed-off-by: Runmin Wang <runminw@codeaurora.org>