powerpc: Reduce printk from pseries_mach_cpu_die()

Remove debug printks in pseries_mach_cpu_die().  These are
noisy at runtime.  Traceevents can be added to instrument this
section of code.

The following KERN_INFO printks are removed:

cpu 62 (hwid 62) returned from cede.
Decrementer value = b2802fff Timebase value = 2fa8f95035f4a
cpu 62 (hwid 62) got prodded to go online
cpu 58 (hwid 58) ceding for offline with hint 2
Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/pseries/hotplug-cpu.c

@@ -122,21 +122,10 @@ static void pseries_mach_cpu_die(void)
 		if (!get_lppaca()->shared_proc)
 			get_lppaca()->donate_dedicated_cpu = 1;
 
-		printk(KERN_INFO
-			"cpu %u (hwid %u) ceding for offline with hint %d\n",
-			cpu, hwcpu, cede_latency_hint);
 		while (get_preferred_offline_state(cpu) == CPU_STATE_INACTIVE) {
 			extended_cede_processor(cede_latency_hint);
-			printk(KERN_INFO "cpu %u (hwid %u) returned from cede.\n",
-				cpu, hwcpu);
-			printk(KERN_INFO
-			"Decrementer value = %x Timebase value = %llx\n",
-			get_dec(), get_tb());
 		}
 
-		printk(KERN_INFO "cpu %u (hwid %u) got prodded to go online\n",
-			cpu, hwcpu);
-
 		if (!get_lppaca()->shared_proc)
 			get_lppaca()->donate_dedicated_cpu = 0;
 		get_lppaca()->idle = 0;