qcom-cpufreq: Remove superfluous NULL check for policy->freq_table

policy->freq_table is initialized in cpufreq_table_validate_and_show().
This table can't be NULL in msm_cpufreq_target(). Because we bail
out from init if cpufreq_table_validate_and_show() returns failure.

Change-Id: I2bdd22ebfa2f2794d4b256159bc66b14a6da74c0
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>