[Bug 248352] mfi(4): Remove RAID map sync functionality

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248352

--- Comment #7 from Bill Steinke <bill.steinke at broadcom.com> ---
The defect is for the following products:
Thunderbolt device ID: 5b
Invader device ID: 5d
Fury device ID: 5f

The issue is that the mfi driver uses the incorrect method to do Raid Map sync;
it is using GET_LD_LIST DCMD to get seqNum.

Dell has one set of RAID Map Sync events which consist of 4 lines of texts with
a total of 262 bytes.

07/09/20 17:16:53: C0:LdDcmdRaidMapCompleteLegacy: Completing FW_RAID_MAP cmd
07/09/20 17:16:53: C0:ldIsFPCapable: LD 00 disabled reason LD properties
07/09/20 17:16:53: C0:ld sync: non-matching seqNums 1
07/09/20 17:16:53: C0:ld sync: 01 unsync'd lds remaining

This set of events occurred 32 times per second, not 128 times per seconds at
the WRITE rate of one page (512KB) per minute, not 4 pages per minute
Then the total would be 17.5 * 4 = 70 days exact to complete 100,000 write
cycles


BSD will need to resolve or remove the RAID Map sync from the mfi driver.

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