Updated the scheduling information of the SKX subtarget in the file X86SchedSkylakeServer.td under lib/Target/X86 to:
- add regular opcodes in addition to the suffixed "_Int" opcodes
- add the (V)MAXCPD/MAXCPS/MAXCSD/MAXCSS/MINCPD/MINCPS/MINCSD/MINCSS instructions that are equivalent to their counterparts without the 'C' as they are part of a hack to make floating point min/max commutable under fast math.