RFR (XS): 6313046: Remove unused frame::native_param_addr code

[Mikael Vidstedt]

Please review this small change which removes the unused/dead 
frame::native_param_addr function along with the corresponding code in 
the SA.

http://cr.openjdk.java.net/~mikael/webrevs/6313046/webrev.00/webrev/

Cheers,
Mikael