IMG.CFG: Update interleave for all disks for Roland MC-x line.

Confirmed by Chris Poacher.

Author: keirf

examples/Host/Roland/IMG.CFG

@@ -38,10 +38,10 @@ tracks = 0-79 # This line can be adjusted
   hskew = 1
   cskew = 2
 
-# Matches 720kB images named *.mc-os.{img,ima,dsk}.
-# This higher level of interleave is found on the Roland MC-500 OS disk
-# (and also likely the MC-300 and MC-50).
-[mc-os::737280]
+# Matches 720kB images named *.mc.{img,ima,dsk}.
+# This higher level of interleave is found on all disks for the
+# Roland MC-300, MC-500 and MC-50.
+[mc::737280]
 cyls = 80
 heads = 2
 secs = 9