Revert r335070 "[X86] Rewrite the max and min reduction intrinsics to make...

Revert r335070 "[X86] Rewrite the max and min reduction intrinsics to make better use of other functions and to reduce width to 256 and 128 bits were possible."

The test changes are failing the buildbot and its going to take me some time to fix it.

llvm-svn: 335072