msm: cpufreq: Move cpufreq table checking earlier

During cpufreq driver init we check whether cpufreq table
is initialize or not. Let's move this check even before
setting any cpufreq policy. Since if table itself is
not initialized then there is no need for further action,
we will just return from that point.

Change-Id: I06eed5c4aad9bbaeac351305392b7247b0220f2f
Signed-off-by: Pankaj Kumar <pakuma@codeaurora.org>