oprofile, s390: Cleanups

Remove unused HAVE_HWSAMPLER config option. It is not used anymore,
removing it.

Also make some functions static and some coding style fixes.

Signed-off-by: Robert Richter <robert.richter@amd.com>
diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c
index 0e38a5b..16c76de 100644
--- a/arch/s390/oprofile/init.c
+++ b/arch/s390/oprofile/init.c
@@ -133,7 +133,7 @@
 	return 0;
 }
 
-int oprofile_hwsampler_init(struct oprofile_operations* ops)
+static int oprofile_hwsampler_init(struct oprofile_operations *ops)
 {
 	if (hwsampler_setup())
 		return -ENODEV;
@@ -166,13 +166,13 @@
 	return 0;
 }
 
-void oprofile_hwsampler_exit(void)
+static void oprofile_hwsampler_exit(void)
 {
 	oprofile_timer_exit();
 	hwsampler_shutdown();
 }
 
-int __init oprofile_arch_init(struct oprofile_operations* ops)
+int __init oprofile_arch_init(struct oprofile_operations *ops)
 {
 	ops->backtrace = s390_backtrace;