trivial: dell-dock: reverse MST update order for I2C
trivial: dell-dock: reverse MST update order for I2C

This mirrors the update process over DP aux to run the ESM update
first.

The thought process is as follows:
The "version" displayed doesn't show ESM version, only standard
bank version.
So if the update fails for the ESM then because the update of the
standard happening first it would never be flashed.

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