Diskmanage: Use S.M.A.R.T. attributes for SSDs wearout lookup

Diskmanage: Use S.M.A.R.T. attributes for SSDs wearout lookup

This replaces a locally maintained hardware map in
get_wear_leveling_info() by commonly used register names of
smartmontool. Smartmontool maintains a labeled register database that
contains a majority of drives (including versions). The current lookup
produces false estimates, this approach hopefully provides more reliable
data.

Signed-off-by: Jan-Jonas Sämann <sprinterfreak@binary-kitchen.de>