soc: qcom: Fix uninitialized variables and prints in rpm stats and log

This patch fixes uninitialized variables and corrects error prints in
rpm stats and rpm log drivers.

Change-Id: I4a2d4a8cf4df4c9c1d750a65beb7454041fc06c2
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>