Fix typos in man pages under /share/man

Found using: devel/py-proselint

Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

cgem: add 64-bit support

Add 64-bit address support to Cadence CGEM Ethernet driver for use in
other SoCs such as the Zynq UltraScale+ and SiFive HighFive Unleashed.

Reviewed by: philip, 0mp (manpa

cgem: add 64-bit support

Add 64-bit address support to Cadence CGEM Ethernet driver for use in
other SoCs such as the Zynq UltraScale+ and SiFive HighFive Unleashed.

Reviewed by: philip, 0mp (manpages)
Differential Revision: https://reviews.freebsd.org/D24304

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