tracing: do not leak kernel addresses

This likely breaks tracing tools like trace-cmd.  It logs in the same
format but now addresses are all 0x0.

Bug: 34277115
Change-Id: Ifb0d4d2a184bf0d95726de05b1acee0287a375d9
Git-repo: https://android.googlesource.com/kernel/msm
Git-commit: 9ad8f2cc1bb73a3e2255dff4ee9c45c909869225
Signed-off-by: Dennis Cagle <d-cagle@codeaurora.org>
diff --git a/kernel/trace/trace_printk.c b/kernel/trace/trace_printk.c
index ad1d616..e82cff5 100644
--- a/kernel/trace/trace_printk.c
+++ b/kernel/trace/trace_printk.c
@@ -304,7 +304,7 @@
 	if (!*fmt)
 		return 0;
 
-	seq_printf(m, "0x%lx : \"", *(unsigned long *)fmt);
+	seq_printf(m, "0x%lx : \"", 0L);
 
 	/*
 	 * Tabs and new lines need to be converted.