soc: qcom: mem-offline: place debug messages properly

Place debug message properly so that printing time of these messages
won't be added to the mem-offline driver stats.

Change-Id: I1aa07eb425a3dc6bac6b7a280657a0830ababb7c
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
Signed-off-by: Sudarshan Rajagopalan <sudaraja@codeaurora.org>