PATCH, rs6000: improve -msdata option description

[Ben Elliston]

I stumbled across this while producing some patches last week.  I am
going to commit this as obvious.

Cheers, Ben

2009-04-01  Ben Elliston  <bje@au.ibm.com>

        * config/rs6000/sysv4.opt (msdata): Improve option description.

Index: config/rs6000/sysv4.opt
===================================================================
--- config/rs6000/sysv4.opt     (revision 145374)
+++ config/rs6000/sysv4.opt     (working copy)
@@ -98,7 +98,7 @@ Use alternate register names
 ;; driver passes all -m* options through.
 msdata
 Target
-no description yet
+Use default method for sdata handling
 
 msim
 Target RejectNegative