cpufreq: Use pr_info() for driver registration and unregistration

Many subsystems depend on cpufreq API for CPU frequency scaling.
Cpufreq API is expected to fail until cpufreq device registers.

Change pr_debug() to pr_info() so that user could determine when
cpufreq API becomes available during boot from kernel messages. This
is crucial to understand whether a cpufreq API failure is benign
during early boot.

Change-Id: Id2dfa009ae33859ec3efcdb29a3296e891852c6a
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 25c1c59..b4d2e83 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2534,7 +2534,7 @@
 	hp_online = ret;
 	ret = 0;
 
-	pr_debug("driver %s up and running\n", driver_data->name);
+	pr_info("driver %s up and running\n", driver_data->name);
 	goto out;
 
 err_if_unreg:
@@ -2566,7 +2566,7 @@
 	if (!cpufreq_driver || (driver != cpufreq_driver))
 		return -EINVAL;
 
-	pr_debug("unregistering driver %s\n", driver->name);
+	pr_info("unregistering driver %s\n", driver->name);
 
 	/* Protect against concurrent cpu hotplug */
 	get_online_cpus();