synaptics-rmi: Limit the number of containers to a sane value
synaptics-rmi: Limit the number of containers to a sane value

Using hongfuzz we managed to build a valid firmware with 246625043 containers,
which took over 60 seconds to parse.

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