intel_pstate: Turn per cpu printk into pr_debug

On larger systems intel_pstate currently spams the boot up
log with its "Intel pstate controlling ..." message for each CPU.
It's the only subsystem that prints a message for each
CPU.

Turn the message into a pr_debug.

Signed-off-by: Andi Kleen <[e-mail]>
Acked-by: Dirk Brandewie <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>

drivers/cpufreq/intel_pstate.c

···
 
 	add_timer_on(&cpu->timer, cpunum);
 
-	pr_info("Intel pstate controlling: cpu %d\n", cpunum);
+	pr_debug("Intel pstate controlling: cpu %d\n", cpunum);
 
 	return 0;
 }