Fixup config file description ordering

sdcard/mt32-pi.cfg

@@ -116,11 +116,11 @@ resampler_quality = good
 # The MT-32 uses an unusual MIDI channel assignment by default. On a real MT-32
 # this is set using a button combination. Use this option to change the initial
 # channel assignment on startup.
+
+# Values: standard*, alternate
 #
 # standard:  Parts 1-8 = MIDI channels 2-9, Rhythm part = MIDI channel 10
 # alternate: Parts 1-8 = MIDI channels 1-8, Rhythm part = MIDI channel 10
-#
-# Values: standard*, alternate
 midi_channels = standard
 
 # Select initial ROM set to use.