[patch][RPi4] Add support for BCM2711 GPIO pull configuration.

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From: UEMURA Tetsuya <t_uemura_at_macome.co.jp>
Date: Mon, 15 May 2023 04:43:32 UTC

Hi.

As I've commented on the bug 256372, the current FreBSD's BCM2835 GPIO
driver can't handle internal pull up/down configuration of BCM2711 (the
SoC on RPI4 family) GPIO.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256372

Fortunately NetBSD has support for the newer method and it's fairly
trivial to port it on FreeBSD, so I've written a patch. Please someone
test and commit it, or if necessary, I'll create a review on Phabricator.

Thanks in advance for help.

-- 
Tetsuya Uemura <t_uemura@macome.co.jp>