synaptics-rmi: Fix the packing of the partition table
synaptics-rmi: Fix the packing of the partition table

The data was part of the union, not the struct. It's also binary format and
thus needs to be packed.

fwupd/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd