Merge branch 'cxgb4-fix-dump-collection-when-firmware-crashed'

Rahul Lakkireddy says:

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cxgb4: fix dump collection when firmware crashed

Patch 1 resets FW_OK flag, if firmware reports error.

Patch 2 fixes incorrect condition for using firmware LDST commands.

Patch 3 fixes dump collection logic to use backdoor register
access to collect dumps when firmware is crashed.
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Signed-off-by: David S. Miller <davem@davemloft.net>