oprofile: Rename variable timeout_jiffies and move to oprofile_files.c

This patch renames timeout_jiffies into an oprofile specific name. The
macro MULTIPLEXING_TIMER_DEFAULT is changed too.

Also, since this variable is controlled using oprofilefs, its
definition is moved to oprofile_files.c.

Signed-off-by: Robert Richter <robert.richter@amd.com>
diff --git a/drivers/oprofile/oprof.h b/drivers/oprofile/oprof.h
index ee38abc..cb92f5c 100644
--- a/drivers/oprofile/oprof.h
+++ b/drivers/oprofile/oprof.h
@@ -24,10 +24,11 @@
 extern unsigned long oprofile_buffer_size;
 extern unsigned long oprofile_cpu_buffer_size;
 extern unsigned long oprofile_buffer_watershed;
+extern unsigned long oprofile_time_slice;
+
 extern struct oprofile_operations oprofile_ops;
 extern unsigned long oprofile_started;
 extern unsigned long oprofile_backtrace_depth;
-extern unsigned long timeout_jiffies;
 
 struct super_block;
 struct dentry;