probe: Add MMC reset support

By unbind'ing and re-bind'ing the device through its driver as mentioned
in this page:
https://unix.stackexchange.com/questions/89207/resetting-mmc-controller-without-physically-removing-the-card

This was tested with a GOOD and BAD device.
1 job for wip/hadess/mmc-probe-support in 3 minutes and 39 seconds (queued for 45 seconds)
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