oprofile, s390: Fix section mismatch of function hws_cpu_callback()

Fixes the following section mismatch:

 Section mismatch in reference from the variable hws_cpu_notifier to the function .cpuinit.text:hws_cpu_callback()
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>

arch/s390/oprofile/hwsampler.c

@@ -578,7 +578,7 @@ static struct notifier_block hws_oom_notifier = {
 	.notifier_call = hws_oom_callback
 };
 
-static int __cpuinit hws_cpu_callback(struct notifier_block *nfb,
+static int hws_cpu_callback(struct notifier_block *nfb,
 	unsigned long action, void *hcpu)
 {
 	/* We do not have sampler space available for all possible CPUs.