MFC r314579,r314785:

r314579 (by np):

Add cxgbetool(8) to the base system.

Move cxgbetool from tools/tools to usr.sbin. Compile and install it on
platforms where cxgbe(4) is built by default. Knobs (WITH_CXGBETOOL and
WITHOUT_CXGBETOOL) have been added so that the user can override the
default setting.

r314785:

Fix some trivial manlint warnings

Sentences should begin on new lines, per manlint.

Bump .Dd for the change

Add cxgbetool(8) to the base system.

Move cxgbetool from tools/tools to usr.sbin. Compile and install it on
platforms where cxgbe(4) is built by default. Knobs (WITH_CXGBETOOL and
WITHOUT_CXGBETOOL) have been added so that the user can override the
default setting.

Reviewed by: ngie@, gnn@, bdrewery@
MFC after: 1 month
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D9854

cxgbe(4): Updated register dumps.

- Get the list of registers to read during a regdump from the shared
code instead of the OS specific code. This follows a similar move
internally. The shared code includes the list for T6.

- Update cxgbetool to be able to decode T5 VF, T6, and T6 VF register
dumps (and catch up with some updates to T4 and T5 register decode).

Obtained from: Chelsio Communications
Sponsored by: Chelsio Communications

cxgbetool: a tool for the cxgbe(4) driver.