linuxkpi: Replicate Linux #includes between headers

The DRM drivers (and probably other parts of the Linux kernel) had a
significant cleanup w.r.t. which source file includes what in Linux
6.10. Non

linuxkpi: Replicate Linux #includes between headers

The DRM drivers (and probably other parts of the Linux kernel) had a
significant cleanup w.r.t. which source file includes what in Linux
6.10. Nonetheless, the DRM drivers still depend on implicit namespace
pollution because some source files do not include all the headers they
should.

This cleanup broke the build with FreeBSD because we do not replicate
the same `#include` directives everywhere.

This commit adds the same `#include` directives in several headers in
order to get the same namespace pollution.

This fixes the build of the DRM drivers from Linux 6.10. An example is
`drm_dp_tunnel.c` which needed `str_yes_no()` defined by
<linux/string_helpers.h> (technically <linux/string_choices.h> in
Linux). It gets it through:

<linux/i2c.h> -> <linux/regulator/consumer.h> -> <linux/suspend.h> ->
<linux/swap.h> -> <linux/memcontrol.h> -> <linux/cgroup.h> ->
<linux/seq_file.h> -> <linux/string_helpers.h>

Reviewed by: emaste
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D54496

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