port-pmax/52497: pxg(4) does not mention PMAG-D boards

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>Number:         52497
>Category:       port-pmax
>Synopsis:       pxg(4) does not mention PMAG-D boards
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    port-pmax-maintainer
>State:          open
>Class:          doc-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 21 08:55:00 +0000 2017
>Originator:     Miod Vallat
>Release:        HEAD
>Organization:
>Environment:
>Description:
pxg(4) mentions the driver supports PMAG-C, PMAG-E, and PMAG-F. However, it should read PMAG-D instead of PMAG-C, as PMAG-C is handled by px(4) and pxg will attach to PMAG-D boards.
>How-To-Repeat:
man pxg
>Fix: