[vector] VectorInsert support cleanup for x86

[Viswanathan, Sandhya]

Hi All,



Please find below a webrev which attempts to clean up the VectorInsert support in x86.ad file using generic operands support.

http://cr.openjdk.java.net/~sviswanathan/vectorIntrinsics/InsertCleanup/



Best Regards,

Sandhya