PPCAnalyst: Merge duplicate expression in ReorderInstructionsCore()

[lioncash]

The type checking is duplicated here, which makes this seem a little weird, so we can get rid of it.

[JosJuice]

Seems like this odd code comes from 40e0dd9. IIRC, it was my intent with that commit to expand ReorderType::CMP to work with all instructions that write to crOut and aren't disqualified by any other checks, getting rid of the isCmp function. But now that I think about it, does this counteract the instruction swapping done by ReorderType::CROR...?

[JosJuice]

Ah, it's actually fine, because the CROR reordering happens after the CMP reordering. I trust my past self then. LGTM.