trace doc: convert trace/events-msr.txt to rst format

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/trace/events-msr.txt → Documentation/trace/events-msr.rst

+================
+MSR Trace Events
+================
 
 The x86 kernel supports tracing most MSR (Model Specific Register) accesses.
 To see the definition of the MSRs on Intel systems please see the SDM
@@ -7,31 +10,31 @@ Available trace points:
 
 /sys/kernel/debug/tracing/events/msr/
 
-Trace MSR reads
+Trace MSR reads:
 
 read_msr
 
-msr: MSR number
-val: Value written
-failed: 1 if the access failed, otherwise 0
+  - msr: MSR number
+  - val: Value written
+  - failed: 1 if the access failed, otherwise 0
 
 
-Trace MSR writes
+Trace MSR writes:
 
 write_msr
 
-msr: MSR number
-val: Value written
-failed: 1 if the access failed, otherwise 0
+  - msr: MSR number
+  - val: Value written
+  - failed: 1 if the access failed, otherwise 0
 
 
-Trace RDPMC in kernel
+Trace RDPMC in kernel:
 
 rdpmc
 
-The trace data can be post processed with the postprocess/decode_msr.py script
+The trace data can be post processed with the postprocess/decode_msr.py script::
 
-cat /sys/kernel/debug/tracing/trace | decode_msr.py /usr/src/linux/include/asm/msr-index.h
+  cat /sys/kernel/debug/tracing/trace | decode_msr.py /usr/src/linux/include/asm/msr-index.h
 
 to add symbolic MSR names.
 

Documentation/trace/index.rst

@@ -16,3 +16,4 @@ Linux Tracing Technologies
    events-kmem
    events-power
    events-nmi
+   events-msr