Make XOP and FMA4 require SSE4A to match GCC behavior. Use this to simplify Bulldozer feature list.
Make XOP and FMA4 require SSE4A to match GCC behavior. Use this to simplify Bulldozer feature list.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@155897 91177308-0d34-0410-b5e6-96231b3b80d8

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