PM / OPP: Prefix exported opp routines with dev_pm_opp_

That's the naming convention followed in most of opp core, but few
routines didn't follow this, fix them.

Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/arm_big_little.h b/drivers/cpufreq/arm_big_little.h
index d7ac320..b88889d 100644
--- a/drivers/cpufreq/arm_big_little.h
+++ b/drivers/cpufreq/arm_big_little.h
@@ -28,7 +28,7 @@
 
 	/*
 	 * This must set opp table for cpu_dev in a similar way as done by
-	 * of_add_opp_table().
+	 * dev_pm_opp_of_add_table().
 	 */
 	int (*init_opp_table)(struct device *cpu_dev);