[X86] Split up the single switch statement in Sema::CheckX86BuiltinFunctionCall into different switches or ifs for each type of check.
[X86] Split up the single switch statement in Sema::CheckX86BuiltinFunctionCall into different switches or ifs for each type of check.

This in preparation for a new check that will check some of the builtins that already had the immediate range check.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@282227 91177308-0d34-0410-b5e6-96231b3b80d8

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