powerpc: Correct annotations of pmu registration functions

This fixes the following warning:
WARNING: arch/powerpc/kernel/built-in.o(.text+0x29768): Section mismatch in reference from the function .register_power_pmu() to the function .cpuinit.text:.power_pmu_notifier()
The function .register_power_pmu() references
the function __cpuinit .power_pmu_notifier().
This is often because .register_power_pmu lacks a __cpuinit
annotation or the annotation of .power_pmu_notifier is wrong.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/mpc7450-pmu.c

@@ -405,7 +405,7 @@ struct power_pmu mpc7450_pmu = {
 	.cache_events		= &mpc7450_cache_events,
 };
 
-static int init_mpc7450_pmu(void)
+static int __init init_mpc7450_pmu(void)
 {
 	if (!cur_cpu_spec->oprofile_cpu_type ||
 	    strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc/7450"))

arch/powerpc/kernel/perf_event.c

@@ -1408,7 +1408,7 @@ power_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu
 	return NOTIFY_OK;
 }
 
-int register_power_pmu(struct power_pmu *pmu)
+int __cpuinit register_power_pmu(struct power_pmu *pmu)
 {
 	if (ppmu)
 		return -EBUSY;		/* something's already registered */

arch/powerpc/kernel/power4-pmu.c

@@ -604,7 +604,7 @@ static struct power_pmu power4_pmu = {
 	.cache_events		= &power4_cache_events,
 };
 
-static int init_power4_pmu(void)
+static int __init init_power4_pmu(void)
 {
 	if (!cur_cpu_spec->oprofile_cpu_type ||
 	    strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power4"))

arch/powerpc/kernel/power5+-pmu.c

@@ -672,7 +672,7 @@ static struct power_pmu power5p_pmu = {
 	.cache_events		= &power5p_cache_events,
 };
 
-static int init_power5p_pmu(void)
+static int __init init_power5p_pmu(void)
 {
 	if (!cur_cpu_spec->oprofile_cpu_type ||
 	    (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5+")

arch/powerpc/kernel/power5-pmu.c

@@ -612,7 +612,7 @@ static struct power_pmu power5_pmu = {
 	.cache_events		= &power5_cache_events,
 };
 
-static int init_power5_pmu(void)
+static int __init init_power5_pmu(void)
 {
 	if (!cur_cpu_spec->oprofile_cpu_type ||
 	    strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power5"))

arch/powerpc/kernel/power6-pmu.c

@@ -535,7 +535,7 @@ static struct power_pmu power6_pmu = {
 	.cache_events		= &power6_cache_events,
 };
 
-static int init_power6_pmu(void)
+static int __init init_power6_pmu(void)
 {
 	if (!cur_cpu_spec->oprofile_cpu_type ||
 	    strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power6"))

arch/powerpc/kernel/power7-pmu.c

@@ -360,7 +360,7 @@ static struct power_pmu power7_pmu = {
 	.cache_events		= &power7_cache_events,
 };
 
-static int init_power7_pmu(void)
+static int __init init_power7_pmu(void)
 {
 	if (!cur_cpu_spec->oprofile_cpu_type ||
 	    strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power7"))

arch/powerpc/kernel/ppc970-pmu.c

@@ -484,7 +484,7 @@ static struct power_pmu ppc970_pmu = {
 	.cache_events		= &ppc970_cache_events,
 };
 
-static int init_ppc970_pmu(void)
+static int __init init_ppc970_pmu(void)
 {
 	if (!cur_cpu_spec->oprofile_cpu_type ||
 	    (strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/970")