[FEAT] Add support for Dell's BOSS mvcli driver

[bashers222]

Supporting Dell's BOSS driver would be handy
It needs to run the BOSS 'mvcli' command and pull stats with this command

cd /opt/BOSS/mvcli_5.0.13.1111_A00/x64/static
./mvcli smart -p 0

This is based on the Marvell Raid controller.
Not a whole lot of support out there, but there does seem to have been a Nagios plug-in developed that can poll most RAID controller and this has support for the BELL BOSS driver: t/check_mvcli.t

Sample output for Port 0 when running ./mvcli smart -p 0:

Smart Info
ID      Attribute Name                                  Current Worst   Threshhold      RawValue
01      Raw read error rate                             100     1       50              00000000216E
05      Reallocated block count                         100     100     5               000000000000
09      Power-on hours count                            100     100     0               000000006B54
0C      Power cycle count                               100     100     0               0000000002C3
AD      Per block max erase count                       78      78      5               00000000009E
B5      Program fail count (total)                      100     100     0               000000000000
C2      Drive temperature                               47      71      0               000000470A2F
C6      Offline scan uncorrectable LBA count            100     100     0               000000000000
C7      CRC error count                                 100     100     0               000000000003
C9      Volatile memory backup source failure           78      78      5               00160000009E
F1      NAND sectors written (total)                    100     100     0               00000044FEEE