drivers: soc: qcom: rpm_stats: Fix uninitialized buffer usage

Add matching else case to fix uninitialized buffer usage in
case of version id mismatch.

Change-Id: I7140692f62760d8f0e38f1cde4e3f9ce91a263f4
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>