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ixgbe: Print FW NVM and Option ROM versions

Description

ixgbe: Print FW NVM and Option ROM versions

It can be useful for system operators to see this kind of information
when correlating issues or requesting support from the OEM or Intel for
hardware and firmware issues.

Reviewed by: gallatin
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D30178

(cherry picked from commit 7660e4ea5cb750ded38a0bd81cde2e2b130222df)