qemu: Create a macro to handle setting bytes/iops iotune values
qemu: Create a macro to handle setting bytes/iops iotune values

Create a macros to hide all the comparisons for each of the fields.

Add a 'continue;' for a compiler hint that we only need to find one
this should be similar enough to the if - elseif - elseif logic.

crobinso/libvirt,datto/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,jfehlig/libvirt,datto/libvirt,libvirt/libvirt,andreabolognani/libvirt,zippy2/libvirt,zippy2/libvirt,datto/libvirt,fabianfreyer/libvirt,datto/libvirt,jardasgit/libvirt,zippy2/libvirt,eskultety/libvirt,libvirt/libvirt,taget/libvirt,libvirt/libvirt,olafhering/libvirt,nertpinx/libvirt,crobinso/libvirt,eskultety/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,eskultety/libvirt,VenkatDatta/libvirt,olafhering/libvirt,nertpinx/libvirt,jfehlig/libvirt,eskultety/libvirt,olafhering/libvirt,andreabolognani/libvirt,taget/libvirt,jfehlig/libvirt,andreabolognani/libvirt,taget/libvirt,crobinso/libvirt,zippy2/libvirt,taget/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,eskultety/libvirt,nertpinx/libvirt,andreabolognani/libvirt,olafhering/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,nertpinx/libvirt,libvirt/libvirt,jfehlig/libvirt,taget/libvirt,crobinso/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,datto/libvirt,andreabolognani/libvirt,jardasgit/libvirt