Patching a patch from a vendor

I'm using Yocto version: scarthgap.

I have a situation in vendor's repo, that has patches that needed to be changed (one of them is as simple as adding the "Upstream-Status:" string to the top of the patch file.

Is this a "thing"? I don't want to be changing the vendor's recipes and patches (it's the qoriq stuff under NXP) but I need to fix some obvious errors.

My problem is that my patches will be applied after theirs so for instance, the "Upstream-Status" fix is already too late and will be reported when bitbake is run.

I have some recipes in the qoriq repos that have errors in them (including files that no longer exist).

Advice would be appreciated.

Cheers!!