Add Equallogic dictionary

Add a dictionary for Equallogic devices. Although part of
Dell since 2008 the vendor ID still points to Equallogic.

The values were obtained from publicly available
"Dell Equallogic Group Manager Online Help, PS Series Firmware
Version 6.0 / FS Series Firmware Version 2.0"
Merge pull request #519 from matsimon/equallogic-dict

Add Equallogic dictionary